SENIOR INTER – BOTANY – PRACTICE TEST – 6
1. The sugarcane plant has
(a) Dumb-bell shaped guard cells(b) Pent amerous flow ers
(c) Ret iculat e venat ion(d) Capsular fruit s
2. Cell w alls of root hairs for absorbing w at er must be
(a) Hydrophobic (b) Perm eable(c) Semipermeable (d) Impermeable
3. Exchange of subst ances betw een individual cells and t heirenvironm ent s t akes place by
(a) Osm osis (b) Diffusion(c) Act ive t ransport (d) All of these
4. When a bark of tissue is cut from st em, of which t hevascular t issue is removed
(a) Xylem (b) Phloem(c) Parenchym a
(d) None of these
5. Best soil for healthy and vigorous growt h of a plant is
(a) Sandy soil (b) Loam(c) Clay (d) None of these
6. Soil formed aft er leaching and rich in Al and Fe is
(a) Alluvial (b) Podosol(c) Lat erit e (d) None of these
7. Act ive t ransport of ions by the cell requires
(a) High t emperat ure (b) ATP(c) Alkaline pH
(d) Salt s
8. Good soil is
(a) W hich holds whole of the wat er that ent ers int o it
(b) Which allow s percolat ing the w at er slow ly from it
(c) Which allow s w at er t o pass very quickly from it
(d) Which allow s limit ed amount of w at er to ret ain into it
9. Lent icels and hydat hodes are small pores w ith followingcom mon att ribut es
(a) Their opening and closing is not regulat ed(b) They allow exchange of gases
(c) They alw ays remain closed(d) They are found on the sam e organ of plant s
10. Which of the event s is more rapid
(a) Suction of w at er and m inerals due to t ranspirat ion pull(b) Cyclosis in cell cyt oplasm
(c) Sugar t ransport in phloem(d) Dist ribut ion of horm ones from one part to ot her
11. At t ract ive forces of cell w alls for wat er molecules is t ermed as
(a) Adhesion (b) Cohesion(c) Osm osis (d) Plasmolysis
12. In t rees, deat h of protoplast s is essent ial for a vit al funct ionsuch as
(a) Stom at al movem ent s(b) Both w at er and food t ransport
(c) Wat er t ransport (d) Food t ransport
13. Which of the follow ing is not a function of water in cell
(a) It provides energy for chem ical react ion(b) It act s as a solvent
(c) It provides a medium for chem ical react ion
(d) It releases hydrogen ions on ionisat ion
14. Act ive absorpt ion is affect ed by
(a) Osm otic concent rat ion(b) Associat e t issue st ructures
(c) Transpirat ion(d) Sucking capacit y of root hair
15. Which one of the following doesn't help in moleculet ransport
(a) Diffusion (b) Osm osis(c) Surface t ension
(d) Active t ransport
16. Root cap has no function in wat er absorption, because
(a) It s vascular syst em is not direct ly connect ed(b) It s cells are loosely placed
(c) It has cells w ithout chloroplast (d) It has no root hair
17. Wat er infilt rat ion will be slowest in
(a) Black cot ton soil (b) Sandy soil(c) Red soil
(d) Loam y soil
18. M eaningful girdling (Ringing) experim ent s cannot be done on sugarcane because
(a) Phloem is present inside t he xylem (b) It can not t olerat e t he injury
(c) Vascular bundles are scat t ered(d) Plant s are very delicat e
19. The amount of w at er held by t he soil aft er drainage isknown as
(a) M ineral w at er
(b) Soil wat er(c) Field capacit y
(d) Gravit ational capacit y
20. Some leaves are removed from the st em cut tings plant ed forveget at ive propagation. This is
done
(a) To increase w at er upt ake(b) Because it helps in root ing of cut tings
(c) To reduce w at er loss(d) Because t he cutt ings need less food
M embranes, Osmosis, Plasmolysis and W ilting
1. Osm osis is the diffusion of
(a) Solut e
(b) Free energy
(c) Wat er
(d) Solut e and solvent
2. The relat ionship xv = nRT is not obeyed by
(a) Concent rat ed solut ion
(b) Dilut e solut ion(c) Ext rem ely dilut e solut ion (d) All of t hese
3. That the cell m embrane is select ively perm eable can be best deduced by
(a) The ent ry of w at er from root hair(b) The ent ry of mineral salt s from the root hair
(c) Both t oget her(d) The rise of sap in plant s
4. The cell w all is perm eable and not a semiperm eablest ruct ure can be best deduced from
t he passage of w at er and mineral salt s from
(a) Soil into periplasm ic space of root hairs(b) Root hairs to cort ical cells
(c) Cortical cells to pericycle(d) Pericycle t o t rachea
5. What happens w hen formalin preserved Spirogyra filam ent is placed in a hypert onic sugar
solut ion
(a) It gains t urgidit y (b) It looses t urgidit y(c) It becom es plasm olysed (d) Nothing happens
6. Select ive perm eability identifies t he process of t ransm issiont hrough sem ipermeable
m em brane is called
Or
The movem ent of w at er from higher w at er pot ential to low er w at er pot ent ial through a semiperm eable m em brane is called
Or
Living cells placed in isotonic solution (0.9% saline) ret ain t heir size and shape. This is based on
t he concept of
(a) Diffusion (b) Osm osis(c) Plasmolysis (d) Imbibition
7. The process of osm osis involves [CPM T 1990]
(a) M ovement of solut e through sem ipermeable m em brane
(b) M ovem ent of solvent through a semiperm eablem em brane
(c) M ovem ent of solution t hrough a sem iperm eable m em brane
(d) None of the above
8.The given figure show s plasm olysis in cell. A is norm al turgid cell, B shows incipient plasmolysis
and C is plasm olysed cell.
Select t he right option in which W, X, Y and Z are correct ly ident ified
(a) Shrunken protoplast , Protoplast , Vacuole, Hypotonic solut ion
(b) Shrunken prot oplast , Flaccid prot oplast, Vacuole, Ext ernal solut ion
(c) Turgid prot oplast, Protoplast , Vacuole, Ext ernal solut ion
(d) Shrunken protoplast, Prot oplast , Vacuole, Ext ernalsolution
9. Assum e t hat an actively respiring cell has 3x num ber of K+in it s cyt oplasm and 2x number of
K+ out side. Aft er somet im e, x number of K+ ent ered int o the cell. What is the process by which
lc' t ransport has t aken place
(a) Primary act ive t ransport (b) Secondary act ive t ransport
(c) Diffusion(d) Passive t ransport
10. A RBC and a plant cell (with thick cell w all) are placed in
dist illed w at er. The solut e concent ration is t he sam e in both the cells. What changes w ould be
observed in t hem
(a) Both plant cell and RBC would not undergo any change
(b) The RBC would increase is size and burst while t he plant cell w ould remain about the same
size
(c) The plant cell would increases in size and burst while the RBC w ould remain about the same
size
(d) Bot h plant cell and RBC would decrease in size and collapse.
11. In the process of osm osis
(a) Both protoplasm and cell w all act as a single layer
(b) Only protoplast act s as a single layer
(c) Only cell m em brane act s as a single layer
(d) None of the above
12. A professor kept som e moist seeds in an airt ight jar andst art ed lect uring. At the end of the
experim ent an explosion occurred in the jar. What did t he professor want to explain
(a) Osm osis (b) Diffusion (c) Anaerobic respirat ion
(d) Imbibition
13. Plant cell plasm olysed in a solution which is
or
If a cell is reduced in size on placing in a solut ion of sugar, the solution is
(a) Hypotonic (b) Hypert onic
(c) Isotonic
(d) Concent rat ion no m eans
14. Why osmosis cannot be dem onst rat ed by a pot atoosmoscope using a solut ion of NaCI
inst ead of sugar; because t he potat o tissue is
(a) Perm eable t o Na ion
(b) Perm eable t o Cl ion
(c) Permeable t o salt solut ion
(d) Imperm eable t o salt solution
15. Graham 's law is correlat ed with
(a) Diffusion (b) Osm oregulat ion (c) Osm osis (d) Adsorption
16. The first process by w hich w at er ent ers into t he seed coat when a seed is placed in
suit able environment for germinat ion is or
In seed germinat ion, the first phenom enon t ake place is
(a) Osm osis (b) Active t ransport (c) Absorption
(d) Imbibition
17. Which of the follow ing experiment is called physiologicaldem onst rat ion of osmosis
a)Thist le funnel — whose m outh is tied with egg mem brane
b)Thistle funnel — w hose m outh is tied w ith parchm ent paper
c)Pot om et er
d)Bell jar experim ent
18. An exam ple of select ively perm eable m em brane is
(a) Plasmalemm a (b) Cell w all(c) M it ochondrial mem brane (d) Chloroplast membrane
19. Plasma m em brane cont rols
(a) Passage of wat er
(b) Passage of w at er and some solut es in and out of the cell
(c) Passage of w at er and solut es into the cell
(d) M ovem ent s of the cell cont ent s out of t he cell
20. Which plant is used for demonst rat ing plasm olysis in t helaborat ory
(a) Tropeolum (b) Impat iense balsam ia(c) Tradescantia (d) All the above
21. Force developed in cort ex of root which pushes w at er int oxylem of root from soil
(a) Diffusion (b) Osmotic pressure(c) Turgor pressure
(d) Root pressure
22. Which of the follow ing st at em ent is correct
(a) Plant absorb excess quantit y of w at er
(b) Plant s t ake in sm all quant it y of m ineral salt s through soil w at er
(c) Wat er and inorganic salt are t aken in simult aneously by root hairs
(d) Plant absorb only one thing at a tim e w at er or inorganic salts
23. Process of osmosis shall cease w hen
(a) Solutions become isot onic or DPD becomes equal
(b) W at er concent ration becom es equal(c) There is no light (d) The level of w at er falls
24. Which of the follow ing has more im bibit ion pow er
(a) Cellulose (b) Hem icellulose(c) Fat
(d) Prot ein
25. Wilting occurs when
(a) Rat e of t ranspirat ion is higher than absorption
(b) Rat e of absorption is higher t han t ranspiration
(c) Excess root pressure
(d) High relat ive hum idit y in air
26. When plant cells are kept in a concent rated salt solution,t hey are
(a) Deplasm olysed
(b) Plasm olysed
(c) Rem ains as such (d) Becom es t urgid
27. The init ial st age of w at er absorption by root cells is by
Or
Dry seeds when placed in w at er sw ells due to
(a) Adsorpt ion
(b) Absorption
(c) Osm osis (d) Imbibition
28. The process by which large m olecules m ove out of t he cell is called
(a) Plasmolysis (b) Deplasm olysis (c) Phagocyt osis(d) Reverse phagocyt osis
29. In t he process of plasmolysis
(a) Endosm osis occurs (b) Exosmosis occurs(c) Imbibit ion occurs (d) Diffusion occurs
30. In t he process of osmosis, volum e of solvent
(a) Increases(b) Decreases(c) Rem ains same(d) Volum e is not relat ed in osm osis
(e) Endosmosis
31. The m em brane which allow s passage of cert ain subst ancesmore readily than others is
t erm ed as
(a) Imperm eable
(b) Sem isolid
(c) Permeable
(d) Select ively perm eable
32. What shall be the sequence of event s during wilt ing of a plant
(a) Exosmosis, deplasmolysis, w ilt ing
(b) Endosm osis, plasmolysis, w ilt ing
(c) Exosm osis, plasmolysis, w ilt ing
(d) Endosm osis, deplasmolysis, wilt ing
33. A plasmolysed cell can be deplasmolysed by placing it in
(a) Isotonic solut ion(b) Hypert onic solut ion
(c) Saturat ed solution(d) Pure w at er or hypot onic solution
34. What would happen if a thin slice of sugar beet is kept inNaCI
(a) It should lose w at er from the cell (b) It should becom e turgid
(c) It should neit her absorbed wat er nor lose it (d) It should absorb w at er from the soil solut ion
35. When a pot ato piece is kept in a highly concent rat ed salt solut ion, then
(a) Pot at o is plasm olysed
(b) Pot ato is deplasmolysed
(c) Pot at o cells get burst ed (d) There is no effect due t o isot onic solution
36. Osm osis is helpful to plant because
(a) Grow th of the young cells is brought about by osm otic pressure and turgor pressure of t hese
cells,
(b) Cert ain turgor mom ent s in plant s are det ermined by osm osis
(c) Bot h (a) and (b) (d) None of these
37. In rainy season, the doors get w et due t o
(a) Imbibition (b) Absorption
(c) Diffusion (d) Endosmosis
38. Due to plasmolysis, the plant cell
(a) Burst s
(b) Sw ells up (c) Becomes t urgid (d) Becom es flaccid
39. The plant undergoes w ilting when
(a) Xylem is blocked (b) Cambium is blocked(c) Phloem is blocked
(d) Som e root s are reduced in number
40. In some plant s, the leaves droop down during day whilebecome normal during night
(a) Due to t em porary w ilting (b) Perm anent wilt ing (c) Both (a) and (b) (d) None of the above
41. Wilting of a plant result s from excessive
(a) Respirat ion
(b) Phot osynthesis (c) Absorption
(d) Transpirat ion
42. Parchment paper is or osm osis is the propert y of
(a) Perm eable membrane(b) Imperm eable m em brane
(c) Sem iperm eable m embrane(d) None of these
43. Percent age of w at er of left in the soil, when a plant wilt is known as [BHU 1991]
(a) Turgidit y (b) Field capacit y(c) W at er ret aining pow er of the soil(d) Wilt ing coefficient
44. Which of the follow ing seeds will show more imbibit ionalpressure
(a) Til seeds (b) Gram seeds(c) Wheat seeds
(d) Rice seeds
45. M ovement of molecules of gases, liquids and solids from aregion of higher concent ration
t o a region of low erconcentration is t ermed as Or
M ovem ent of particles of m at t er in t he cell due to it s ow nkinet ic energy is called
(a) Diffusion (b) Evaporation
(c) Transpirat ion
(d) Osm osis
46.During osmosis, w at er m oves t hrough a m em brane
FROM
TO
a)Low w at er pot ential
High w at er pot ential
b)High solut e concent rat ion Low solut e concent ration
c)High osm otic pot ent ial
Low osmot ic pot ential
d)A hypotonic solution
Hypert onic solut ion
47.
How w at er rises from t he rhizoids of Riccia t o it s assim ilat ory
filam ent s ? It is through
(a) Osm osis (b) Root pressure
(c) Capillary (d) Transpirat ion pull
48. The plant s face wilt ing due to use of excessive fert ilizers
because of
[CPM T 1998]
(a) Exosmosis (b) Endosm osis
(c) Imbibition (d) None of these
49. Plant cells subm erged in dist illed w at er will becom e
(a) Turgid
(b) Flaccid
(c) Plasmolysed
(d) Imperm eable
50. Osm osis is defined as the process in which
(a) W at er diffuses from low er concent ration to higherconcent rat ion
(b) Solut es diffuse from low er concent rat ion to higherconcent rat ion
(c) Active t ransport of ions t akes place
(d) Passive t ransport of ions t akes place
OSM OTIC PRESSURE(OP), TURGOR PRESSURE(TP),DIFFUSION PRESSURE DEFICIT(DPD)
W ATER POTENTIAL
1. The osm otic param et er det erm ining flow of w at er from onecell t o another is Or
The act ual pressure w ith w hich w at er ent ers int o cell is called
(a) Osm otic pressure (b) Turgor pressure(c) Diffusion pressure deficit (d) Hydrost atic pressure
2. Addition of solut e in the cell develops
Or
DPD of a cells mainly depends upon
(a) TP (b) OP
(c) DP (d) WP
3.DPD is equal to
(a) OP x TP
(b) OP + TP (c) OP - TP
(d) TP - OP
4. Root pressure develops due to
(a) Low osm ot ic pot ent ial in soil
(b) Passive absorption
(c) Increase in t ranspirat ion
(d) Active absorption
5. Which of the following stat ement s are t rue / false
A. The positive hydrost atic pressure is called turgor pressure
B. Wall pressure exert s to prevent t he increase ofprotoplasm size
C. Diffusion is m ore rapid in liquids than in gases
D. Diffusion of w at er through a semi-permeablemembrane is called imbibit ion
E. Osm osis is movem ent of subst ances w hich t akes placealong a diffusion gradient
(a) A and B are t rue & C, D and E are false(b) A and C are t rue & B, D and E are false
(c) A and D are t rue & B, C and E are false(d) A and E are t rue & B, C and D are false
(e) C, D and E are t rue & A and B are false
6. See t he follow ing diagram, when the TP of the cell Bincreases t o 18. What changes w ould be
occur with regard t o wat er movem ent
(a) No movem ent of w at er w ill occurred(b) B actively absorb w at er from neighbor cell
(c) W at er diffuses into B from out er cell(d) Cells A, C, D and E absorb w at er from B
7. Observe t he follow ing experim ent
Aft er a few days, which of the follow ing changes w ill have occurred
(a) A drop in level X and a rise in level Y(b) A rise in level X and a rise in level Y
(c) A drop in level X and a drop in level Y(d) A rise in level X and a drop in level Y
8. Cell A has osmot ic pot ent ial of -18 bars and pressure pot ent ial of 8 bars, whereas, cell B has
osm otic pot ent ial of-14 bars and pressure pot ent ial 2 bars. The direction of flow of wat er w ill be
(a) From cell B t o cell A (b) From cell A to cell B(c) No flow of w at er (d) In bot h the direct ions
9. In hypert onic solution a cell w at er pot ential
(a) Decreases(b) Increases(c) First increases t hen decreases(d) No change
10. In a fully t urgid cells, t he values of DPD, OP and TP willshow the t endencyOr
The cell is fully t urgid when
(a) DPD = 10 at m ,
OP = 15 at m ,
TP = 5 at m
(b) DPD = 5 atm ,
OP = 12 at m ,
TP = 7 at m
(c) DPD = 2 at m,
OP = 7 at m,
TP = 5 at m
(d) DPD = 0 at m,
OP = 15 at m ,
TP = 15 at m
11. The osmot ic pot ential and pressure pot ent ial of three cells(A, B, C) locat ed in different part s
of an act ively t ranspiring plant are given below
Cell
Osm ot ic Pot ent ial Pressure Pot ential
(M pa)
(M pa)
A.
-0.87
0.44
B.
-0.92
0.34
C.
-0.68
0.27
Identify these t hree cells as root hair, root cort ical and leafmesophyll cells respect ively
(a) A, B, C
(b) A, C, B
(c) C, A, B
(d) B, C, A
12. In xerophyt es, t he osm ot ic concent rat ion of cell sap is
(a) Less t han norm al (b) Normal(c) M ore than normal (d) No osm otic pressure at all
13. Select t he correct st at em ent for diagram below
(a) Cell " A" will gain H2O, Cell "B" will lose H2O, Cell "C" neither gain nor loses H2O
(b) Cell " A" will gain H2O, Cell "B" neither gain nor loses H2O, Cell " C" will lose H2O
(c) Cell " A" neit her gain nor loses H2O, Cell "B" w ill gain H2O, Cell " C" will loses H2O
(d) Cell " A" will lose H2O, Cell "B" will gain H2O, Cell "C" neit her gain nor loses H2O
14. Two cells A and B are contiguous. Cell A has osm ot icpressure 10 at m, turgor pressure-7
at m and diffusion pressure deficit 3 at m . Cell B has osm otic pressure 8 atm, turgor pressure 3
at m and diffusion pressure deficit 5 at m.The result will be
(a) M ovem ent of w at er from cell B t o A
(b) No movem ent of w at er
(c) Equilibrium bet w een t he t wo
(d) M ovem ent of wat er from cell A t o B
15. If w at er ent ers in a cell, the pressure exert ed by it s sw ollenprot oplast is
Or
Turgidity of the cells is m aint ained by
(a) Turgor pressure (b) DPD
(c) Osm otic pressure (d) Imbibition
16. When t he mesophyll cells lose w at er t heir DPD
(a) Increases (b) Decreases (c) Rem ain const ant (d) None of the above is applicable
17. The rat io of osm otic pressure exert ed by 1 M sucrose and1 M NaCI solution will be
(a)
1
(b)
2
(c)
0.1
(d)
0.5
18. When osmotic pot ential is eit her zero or negat ive andpressure pot ential is posit ive, then t he
w at er pot ent ial w ill be
(a) Negat ive (b) Posit ive
(c) Somet im es negat ive and som et imes posit ive(d) None of the above
19. Which one of the follow ing st at ement s is w rong
(a) W at er pot ential is the chemical pot ent ial of t he w at er
(b) Solut e pot ent ial is alw ays negat ive
(c) Pressure pot ent ial is zero in a flaccid cell
(d) W at er pot ent ial equals solut e pot ential in a fully turgid cell
(e) Pressure pot ent ial is negat ive in a plasmolyzed cell
20. What w ill be the effect of accumulation of Icf ions in guardcells
(a) W at er pot ential increases (b) Wat er pot ential decreases
(c) Loss of t urgidit y
(d) Exosmosis
21. Observe t he following figure
Aft er t he syst em reaches
equilibrium, Which of the following
changes w ill have occurred
(a) First t he level of w at er is high in tube A and t han w at er level is decreased
(b) No change is observed
(c) The w at er level is higher in side B than in side A
(d) The w at er level is higher in side A than in side B
22. Under given suit able conditions, the DPD will be m ore than OP
(a) W hen OP is equal t o TP
(b) When OP is less than TP
(c) When OP is great er t han TP
(d) When TP is negat ive
23. Wat er is necessary for...
(a) Cont ent of protoplasm (b) Solvent
(c) Reagent (d) All above
24. See t he follow ing diagram
Init ially solut ion in side A, w it h respect t o side B, is
(a) Lower
(b) Isot onic(c) Hypert onic (d) Hypot onic
25. Wat er pot ential can be obt ained by
(a) OP + TP (b) OP = WP (c) P + 
(d) OP — DPD
26. Solut e pot ential of 0.a solution is alw ays
(a) = 0 (b) > 0
(c)
<0
(d) Bet w een 0-1
27. Osm ot ic pressure of a solut ion is [BVP 2004]
(a) Great er t han pure solvent (b) Less t han pure solvent
(c) Equal t o pure solvent
(d) Less t han or great er t han pure solvent
28. Ident ify the correct relat ionship with reference t o w at erpot ential of a plant cell.
29. Wat er pot ential  m easured in bar or in
(a) lb/ in2
(b) m m of Hg (c) at m
(d) All the above
30. Glucose is not st ored in plant due to
(a) Decrease in osmotic pressure
(b) Increase in osmot ic pressure
(c) Increase in turgor pressure
(d) Decrease in t urgor pressure
31. When osmotic pressure becom es equal t o the w all pressure,t hen
(a) The flow of w at er w ill be inside the cell
(b) The flow of w at er w ill be out side the cell
(c) Bot h flow will occur inside as w ell as out side
(d) There w ill be no flow
32. What w ill be the direct ion of movem ent of w at er, w hen asolution A having w at er pot ential of
- 9 bars and anot her solut ion B of - 4 bars is separat ed by a sem iperm eablem em brane
(a) B to A
(b) A t o B
(c) Bot h direct ions (d) None of these
33. Turgor pressure becomes equal t o t he w all pressure when
(a) W at er leaves t he cell(b) No exchange of wat er t akes place
(c) Wat er ent ers t he cell(d) Solut e goes from the cell into w at er
34. When a plasmolysed cell is placed in a hypot onic solutiont hen wat er will move inside t he cell.
Which force causes t his
(a) DPD (b) OP(c) WP
(d) None of these
35. When a cell is fully turgid, which of t he follow ing will be zero
Or
The pot ent ial energy of w at er is referred to as
(a) W all pressure
(b) Osm otic pressure(c) Turgor pressure
(d) W at er pot ent ial
36. An ideal molar solution at 0°C will have an osm otic pressure of
(a) 10 at mosphere
(b) 20 atmosphere(c) 22.4 at m osphere
(d) 4.3 at mosphere
37. Which st at em ent is correct
(a) Osm ot ic pressure of solut ion is great er t han pure solvent
(b) Osmotic pressure of solut ion is low er than the purew at er
(c) Osm ot ic pressure of solut ion is equal
(d) None of these
38. 0.1M solut ion of a solut e has a wat er potent ial of
(a) -2.3 bars (b) 0 bar
(c) 22.4 bars (d) + 2.3 bars
39. When wat er moves t hrough a semipermeable mem brane,w hich of the following is creat ed
(a) OP (b) SP
(c) TP (d) WP
40. Addit ion of a solut e t o pure w at er causes
(a) Negat ive w at er pot ential
(b) M ore negat ive w at er pot ential
(c) Positive w at er pot ent ial
(d) M ore posit ive wat er pot ential
41. See t he follow ing figure and point out the st atem ent which isnot correct
rat e of osmosis depend
(a) The direct ion and the
upon both the pressure gradient and conc. gradient
(b) Presence of a SPM is a prerequisit e for this process t ooccur
(c) M ovement of solut e will t ake place from chamber A to B
(d) M ovem ent of solvent molecules w ill t ake place fromcham ber A t o B
ABSORPTION OF WATER AND ASCENT OF SAP
1. Transpiration and root pressure cause w ater t o rise in plant sby
(a) Pulling and pushing it , respect ively
(b) Pushing it upward
(c) Pushing and pulling it, respect ively
(d) Pulling it upw ard
2. M ost widely accept ed explanat ion for the ascent of sap int ree is
(a) Capillarity(b) Roll of at mospheric pressure
(c) Pulsating act ion of living cells(d) Transpiration cohesion theory of Dixon
3. A column of w at er within xylem vessels of t all t rees does not break under it s w eight because of
(a) Tensile st rengt h of w at er(b) Lignification of xylem vessels
(c) Positive root pressure(d) Dissolved sugars in w at er
4. Which of the following is not t rue for act ive t ransport
(a) It is a chem ical process
(b) Energy is required for this process w hich is obt ained in the form of ATP
(c) It t akes place t hrough special organic molecules called carrier molecules
(d) This process is not modified by enzym es
5. Upward movement of w at er in plant s is called
(a) Sucking
(b) Ascent of sap(c) Translocation (d) None of these
6. Wat er w ill be absorbed by root hairs w hen
(a) Concent rat ion of salt in t he soil is high(b) Concent rat ion of solut es in the cell sap is high
(c) Plant is rapidly respiring(d) They are separat ed from soil by a perm eable membrane
7. The fact or or process which best explains t he rise of w at erfrom root s(100 mt s) to t he top of
t all t ree is
(a) Break down of ATP(b) Root pressure(c) Capillary rise of w at er in xylem
(d) Cohesion of w ater and t ranspiration pull
8. The path of w at er from soil upt o secondary xylem is
(a) Soil Root hair cell wall Cort exEndodermisPericycleProt oxylem M et axylem
(b) M et axylem Prot oxylem  Cort ex Soil Root hair
(c) Cort ex Root hair  Endoderm is  PericycleProt oxylem M et axylem
(d) PericycleSoil Root hair  Cort ex  Endoderm isProt oxylem M et axylem
9.Physical force t heory explains
(a) Non-living cells are not essent ial for ascent of sap
(b) Living cells are not essent ial for ascent of sap
(c) Ascent of sap may occur in both living and non-livingcells(d) Both (b) and (c)
10. The rupture and fract ionat ion do not usualy occur in thew at er colum n in vessel/ t rach eids
during t he ascent of sap because of
(a) W eak gravit at ional pull (b) Transpirat ion pull
(c) Lignified thick w alls (d) Cohesion and adhesion
11. Which of the follow ing would be in insignificant am ount inxylem sap
(a) Sugar
(b) Nit rat es
(c) Phosphat es
(d) W at er
12. Bordered pit s relat ing with w at er upt ake located in
(a) Cort ex(b) Endoderm is(c) Vessel elem ent s (Xylem duct )(d) Tracheary elem ent s
13. M ost of the wat er flow in t he root t akes place via theapoplast because
(a) Cort ical cells are loosely arranged
(b) Cort ical cells are living cells
(c) Cort ical cells are t hin w alled cells
(d) All of the above
14. In wat er logged soil, plant s generally are killed because of
(a) Deficiency of minerals
(b) Excessive absorpt ion of w at er
(c) Absence of air in the soil
(d) St arvat ion
15. Which of the follow ing helps in t he absorpt ion of w at er andmineral salt s
(a) M ycorrhiza
(b) Anabaena
(c) Nostoc
(d) None of these
16. The given diagram indicat es rout es of t ransport of w at er andm inerals from the soil through
t he root . Identify let t ers A, B, C and D
(a) A - Apoplast ic, B Symplast ic, C - Cellulosic st rip, D -Xylem vessels
(b) A - Symplast ic, B - Apoplast ic, C - Cellulosic st rip, D-phloem vessels
(c) A - Apoplast ic, B - Symplastic, C - Casparian st rip, D-Xylem vessels
(d) A - Symplast ic, B - Apoplast ic, C - Casparian st rip, D -Xylem vessels
17. The m ovement of w at er from one cell of t he cort ex t o theadjacent one in root s is due t o
(a) Accumulation of inorganic salt s in the cells
(b) Accumulation of organic compounds in t he cells
(c) Chemical pot ent ial gradient
(d) W at er pot ent ial gradient
18. In soil, w at er available for plant s is
(a) Capillary w at er
(b) Hygroscopic w at er(c) Gravit ational w at er (d) Chem ically bound wat er
19. Passage cells are t hin w alled cells found in
(a) Endoderm is of root s facilit ating rapid t ransport of w at er from cort ex t o pericycle
(b) Phloem elem ent s t hat serve as ent ry points for subst ances for t ransport to other plant
part s
(c) Test a of seeds t o enable em ergence of grow ing embryonic axis during seed germ inat ion
(d) Cent ral region of st yle t hrough which the pollen tube grow s tow ards the ovary
20. M ovement of H2O t hrough cell w all is called
(a) Apoplast (b) Symplast (c) Tonoplast
(d) None of these
21. If t w o solut ions have t he sam e osmolarit y, t hey are said tobe
(a) Hypert onic
(b) Hypot onic(c) Isotonic
(d) None of these
22. Which of the follow ing st at em ent s is/ are t rue
A. The apoplastic movem ent of w at er occurs exclusively t hrough the cell w all w ithout crossing
any m em branes
B. Solut es present in a cell (or in any solution) increase t hefree energy of w at er or wat er
pot ent ial
C. The sym plast ic m ovem ent occurs from cell to cell through the plasm odesm at a
D. M em brane perm eabilit y depends on the m em brane com position, as w ell as the chem ical
nature of t hesolut e
(a) A and B only
(b) B and D only(c) A, C and D only (d) A, B and D only(e) C only
23. Which of the follow ing st at em ent s is incorrect
(a) W at er and salt s are t aken simult aneously by root hairs
(b) Plant s absorb one t hing at a t im e either w at er orinorganic salt
(c) Plant s absorb excess quantit y of wat er
(d) All of the above
24. Apoplast ic movem ent of w at er in plant s occurs through
(a) Casparian st rips (b) Plasm a mem brane(c) Int racellular spaces (d) Plasm odesm at a
25. When t he concent ration of the soil solut es is low , theabsorption of w at er
[KCET 2007]
(a) Rem ains norm al (b) Is stopped(c) Is increased
(d) Is decreased
26. Simult aneous movem ent of t wo molecules across amem brane in the sam e direct ion is
know as
(a) Antiport (b) Symport (c) Uniport
(d) Biport
27. M ost accept ed theory for ascent of sap is
Or
Sap ascends in woody st em s because of root pressure and
(a) Capillarity theory (b) Root pressure t heory
(c) Pulsat ion theory (d) Transpirat ion pull
28. Root syst em in a plant is w ell developed
(a) Due to deficiency of auxin
(b) Due to deficiency of cyt okinins
(c) Due to deficiency of minerals
(d) For increased absorption of w at er
29. During absorpt ion of wat er by root s, the wat er pot ential ofcell sap is low er t han t hat of
(a) Pure w at er and soil solution
(b) Neit her pure wat er nor soil solut ion
(c) Pure w at er but higher than t hat of soil solut ion
(d) Soil solution but higher t han t hat of pure wat er
30. St orage capacit y of the soil is t he ext ent t o which it can hold
(a) Gravit at ional w at er
(b) Capillary w at er(c) Hygroscopic w at er
(d) All of the above
31. Act ive t ransport is charact erized by
(a) Requires special m em brane prot eins(b) Highly select ive
(c) Requires ATP energy
(d) All of the above
32. The t ransport of w at er and salt s t akes place t hrough
(a) Phloem
(b) Xylem
(c) Sieve tubes
(d) Sclerenchym a
33. The direct ion of wat er in t he leaflet s of Cycas from midrib is
(a) Lat eral
(b) Downw ard
(c) Upw ard
(d) Downw ard and upw ard
34. In plant s, wat er supply is due t o
(a) Osm osis (b) Imbibition (c) Gut t ation (d) Adhesion force
35. By w hich of the following act ive upt ake of w ater is affect ed
(a) Transpirational pow er of t he root hairs
(b) Typical tissue organization
(c) Tension due to t ranspirat ion(d) Osm ot ic concent rat ion of the cell sap of the leaves
36. The principle pat hw ays by which w at er is t ranslocat ed inangiosperms is
(a) Xylem and phloem toget her
(b) Sieve t ubes and m embers of phloem
(c) Sieve cells of phloem
(d) Xylem vessel syst em
37. Passive absorpt ion of w at er by the root syst em of the result of
(a) Forces creat ed in the cells of the root
(b) Increased respirat ory act ivit y in root cells
(c) Tension on t he cell sap due t o t ranspiration(d) Osmot ic force in t he shoot syst em
38. Root hair absorb wat er from the soil on account of
(a) Turgor pressure (b) Osm otic pressure(c) Suct ion pressure (d) Root pressure
39. The abilit y t o rise in thin tubes and t he Abilit y t o resist apulling force are respect ively referred
t o as
(a) Tensile st rengt h and capillarit y(b) Adhesion and capillarit y
(c) Cohesion and adhesion(d) Cohesion and capillarit y(e) Capillarit y and t ensile st rengt h
40. Ascent of sap is due t o which force
Or
The most import ant force w hich pulls wat er up in t all t rees is
(a) Imbibition (b) Cellular force(c) Cohesive force (d) At mospheric pressure
41. When wat er ent ers in root s due to diffusion, it is t erm ed as
(a) Osm osis (b) Endocyt osis(c) Active absorption
(d) Passive absorption
42. M ost wat er absorption in plant s t akes place through
(a) Root cap (b) Root apex(c) Root hair zone
(d) M erist emat ic zone
+
+
43. Na , K dependent ATPase act ivit y helps in t ransport of
+
+
+
(a) K inw ard, Nat out w ard (b) K inward only (c) Na+ inward only (d) K out ward, Na+ inw ard
44. The continuous excret ion of w at ery subst ance from st ump ofa w ell w at ered pot plant aft er
cut ting off t he shoot slight ly above t he base is due to
Or
Exudat ion of xylem is due t o [RPM T 1995]
(a) Root pressure
(b) Gutt at ion(c) Transpirat ion
(d) Imbibition
45. See t he follow ing diagram and identify the process occurringin I, II and III
I
II
III
(a) Uniport
Antiport
Sym port
(b) Sym port Co port
Antiport
(c) Antiport
Uniport
Sym port
(d) Co port
Sym port
Antiport
46. The follow ing diagram represent the pathway of w at erm ovem ent in the root . Identify A, B
and C
respect ively
(a) Plasmodesm at a, Casparian st rip, Endodermis
(b) Tight junct ion, Casparian st rip, Endoderm is
(c) Gap junct ion, Casparian st rip, Endodermis
(d) Desmosom e, Casparian st rip, Endoderm is
47. Exam ine the experim ent show n in the given figure
Aft er a few days, which of the following changes will have occurred
(a) A drop in level X and a rise in level Y(b) A rise in level X and a rise in level Y
(c) A drop in level X and a drop in level Y(d) A rise in level X and a drop in level Y
48. The given diagram show s t he appearance of plant cell im m ersed in a solution which is
isotonic t o t he cell's sap
Which of the following diagram s shown below m ost accurat ely represent s the appearance
of this cell aft er im mersion in a hypert onic solut ion
FACTORS AFFECTING ABSORPTION OF W ATER & ASCENT OF SAP
1.Which of the following fact ors affect the absorpt ion of w at erby root s
(a) Soil t em perat ure (b) Soil aerat ion(c) RH of t he at m osphere (d) All the above
2. According to Sachs t heory, the ascent of sap t akes place
(a) In xylem duct s with the help of imbibit ion(b) In t he phloem with t he help of im bibition
(c) In pit h with t he help of imbibit ion(d) All of the above
3. Suit able t em perat ure for act ive absorpt ion of water by root is
(a) 40-45° C(b) 10-15° C(c) 20-35° C(d) Can t ake a t any t emperat ure
4. M any t ransplant ed seedling m ay not survive because
(a)They do not like t he new soil(b) They do not get required m ineral salt s
(c) M ost of the root hairs are lost during transplant at ion(d) The leaves get damaged
5. At mid day hours, the xylem sap is in a st at e of
(a) Compression
(b) Tension (c) Relaxat ion (d) Adhesion
6. Wat er-logged condition will quickly occur in which t ypeof soil Or
Holding capacit y is highest in
(a) Sand
(b) Clay
(c) Gravel
(d) Loam
7. When a pot t ed plant is flooded w ith w at er, the m agnit ude ofroot pressure
(a) Increases (b) Decreases(c) Rem ains unchanged
(d) Becom es negat ive
8. The force of t ension cohesion exceeds root pressure on a
(a) Rainy day (b) Foggy m orning(c) Sunny day
(d) Full moon night
TRANSPIRATION
1.The chief role of t ranspirat ion in plants is t o cause
(a) Loss of surplus w at er (b) Cooling of the plant
(c) Rapid ascent of sap (d) Rapid rise of m inerals
2. Guard cells help in
(a) Prot ect ion against grazing(b) Transpiration(c) Gut t at ion(d) Fighting against infect ion
3. In w oody t rees, t he exchange of gases bet w een t he out erat m osphere and the int ernal tissue
of the st em t akes place t hrough
(a) Aerenchyma (b) St omat a(c) Pneumat ophores (d) Lent icels(e) Trichom es
2
4.The number of st om at a and epiderm al cells in 1 mm leafarea of low er epiderm is of t he leaves
of X, Y and Z plant s are given below.
Arrange t he plants in decreasing order of t heir stom at al index.
Cell
Num bers of Stom ata
Num bers of epiderm alcells
X
30
150
Y
60
240
Z
90
400
The correct answ er is
(a) X, Y, Z
(b) Y, Z, X
(c) Z, Y, X
(d) Y, X, Z
5. Force generat ed by t ranspirat ion can creat e pressure sufficient to lift wat er even upt o t he
height of
(a) 130 feet
(b)
130 met re
(c)
230 feet
(d)
230 met re
6. Posit ion and frequency of stom at a can be det erm ined by
(a) Calculating the loss of w ater
(b) Cobalt chloride paper m et hod
(c) Potom et er
(d) Porom et er
7.In bot h t ranspiration and evaporat ion, w at er is lost in theform of vapour yet t hey differ,
because
(a) Both t ranspirat ion and evaporation are sim ilar but the rat e of w at er loss differs
(b) Frequency of wat er loss is different in bot h of t hem
(c) Transpirat ion is a physical process and evaporat ion is aphysiological process
(d) Transpirat ion is a physiological process andevaporation is a physical process
8. Out of t he follow ing, which one is the most com mon t ype oft ranspirat ion
(a) Foliar
(b) Stom at al(c) Lent icular
(d) Cuticular
9. Wilt ing of leaves in hot w eat her is due t o
(a) Excessive t ranspirat ion (b) Excess of t ranspirat ion as compared to w at er absorption
(c) Excessive wat er absorpt ion by root s
(d) Lack of w at er absorption
10. In hot sum mer day, plant cooling is due to
(a) Loss of w at er vapours from leaf
(b) Transport of wat er in plant
(c) Loss of liquid w at er
(d) Loss of w at er from ent ire plant
11. Transpiration facilit at es
(a) Elect rolyt e balance
(b) Opening of st om ata
(c) Absorption of w at er by root s
(d) Excret ion of minerals
12. Transpiration is m ainly a process of
(a) Osm otic pressure (b) Imbibition
(c) Diffusion (d) Respirat ion
13. Small (Tiny) part icle is placed in the pore of stomat a what will be happening
(a) It w ill fall on ground
(b) It will st ick to low er epiderm is
(c) It w ill be accom modat e t o m esophyll cell(d) It will be accom modat e in vascular tissues
14. St omat a of CAM plant s
(a) Never open(b) Are alw ays open
(c) Open during the day and dose at night (d) Open during the night and close during the day
15. Transpiration rat io is the ratio of moles of H2Ot ranspired/ m oles of CO2 fixed. This
rat io is m easure of
(a) The efficiency of guard cells on stom ata] movement
(b) Effect iveness of st omata is m axim izing photosynt hesisw hile m inimizing w at er loss
(c) Dist inguishing a xerophyt e from a glycophyt e(d) Stomat al pore size of t he leaves
16. Scotoactive st om at a are charact er of which plant s
(a) Heliophyt es
(b) Xerophyt es(c) CAM Plant s
(d) All of these
17. Which of the follow ing is not a purpose of t ranspirat ion
(a) Helps in absorpt ion and t ransport in plant s
(b) Prevent s loss of wat er
(c) M aint ains shape and st ructure of plant s by keeping t he cell turgid
(d) Supplies w at er for photosynthesis
(e) Cools leaves surface
18. In which t ype of plant s, t he st omat a rem ain closed duringday t ime and open during night
(a) Photophilous
(b) Succulent s
(c) Sciphilous (d) Halophyt es
19. A sm all m esophyt ic t wig wit h green leaves is dipped intowat er in a big beaker under sunlight.
It demonst rat es
(a) Photosynt hesis (b) Respirat ion
(c) Transpirat ion
(d) None of the above
20. Which of the following plant is able t o show rolling of leafduring mid of t he day
(a) Nerium
(b) M elia
(c) Amophila (d) All the above
21. Which of the following plant s economises t ranspirat ional lossof wat er
(a) C3 (b) C4,(c) Both equally
(d) C2
22. In barley t ype of plant , the st omat a open
(a) For few hours during day(b) During night (c) Throughout day and night (d) Rem ain closed
23. St omat a' frequency m eans
(a) No. of st om at a per unit area of leaf surface
(b) No. of epiderm al cells per unit area of leaf surface
(c) No. of m esophyll cells in t he per unit area of leaf
(d) None of the above
24.Stom at al Index I is equal to
25. In Vallisneria, stom at a are
(a) Present on upper epidermis of leaf
(b) Present on low er epiderm is of leaf
(c) Present on both t he epiderm is of leaf
(d) Not present
26. In most of the thin leaf m esophyt es, t he leaf st om at a openduring day and close during night .
It comes under
(a) Barley t ype
(b) Pot ato t ype
(c) Alfalfa t ype
(d) Bean t ype
27. Graft ed flow er is cont ained in saline w at er because
(a) Suit able nut rient available t o flow er
(b)Row er becom e fresh in long durat ion due t o lesst ranspiration
(c) Flower becom e fresh in long duration due t o regulat edosmot ic pressure of flower cell
(d) Row er is prot ect ed by m icrobes
2
28. The number of stom at a present per cm of leaf is
(a) Less t han 100
(b)
1000 t o 60000 (c) One million
(d) None of the above
29. Which process is favoured by t ranspirat ion
(a) Photosynt hesis (b) Conduction of w at er(c) Stomat al opening
(d) All the above
30.It rc and rs respect ively represent s cut icular and stom at alresist ances, the t ot al resist ance (R)
could be expressed as
31. The follow ing percent age of w at er absorbed by herbaceousplant s is lost in t ranspiration
(a) 80
(b)
60
(c)
90
(d)
40
32. When st rips of chloride papers are placed on either side of adorsivent ral leaf, why the st rips
on the low er side becom e speedily pink ? Because
(a) M ore CO, is evolved from the lower side(b) M ore 0 2 is evolved from t he low er side
(c) M ore H2O is lost from the lower side
(d) All the above
33. Which of the follow ing plant s do not t ranspire
(a) Algae
(b) Fungi
(c) Subm erged hydrophyt es (d) All the above
34.Stom at a open at night and close during day inSunken st om at a are adapt ations of w hich
cat egory of plant s
(a) Xerophyt es
(b) Gamet ophyt es
(c) M esophyt es
(d) Hydrophyt es
35.Lent icular t ranspiration t akes place in
(a) Fruit s
(b) Woody st em s(c) Leaves (d) All the above
36.Which of the following w all of guard cells is thick
(a) Out er
(b) Inner
(c) Side w all (d) All the t hree
37. The cells surrounding t he stom at al pore are
(a) Guard cells
(b) Subsidiary cells(c) Chromophil cells
(d) None of the above
38. St omat a in angiosperms does not open during [CPM T 1992]
(a) Noon
(b) Tw ilight
(c)
11 O'clock
(d) At midnight
39. St omat a is absent in
(a) Submerged plant s
(b) Desert plant s(c) Float ing plant s (d) All the above
40. Sunken st om at a are found in leaves of
(a) Trifolium (b) Lem na
(c) Nerium
(d) Lilium
41. M aximum t ranspirat ion occurs in
(a) M esophyt ic plant s (b) Hydrophyt ic plant s(c) Xerophyt ic plant s (d) Algal cells
42.Which of the following is not the t ype of t ranspirat ion
(a) Stom at al t ranspirat ion
(b) Cuticular t ranspiration
(c) Lenticular t ranspiration (d) Endoderm al t ranspirat ion
43.Generally st om at a found on the low er surface of leaf. Thusapproxim at e percent age of
t ranspiration t hrough abaxial surface is
(a) 47%
(b)
57%(c) 67% (d)
97%
FACTORS AFFECTING TRANSPIRATION
1. Due t o low at mospheric pressure, t he rat e of t ranspiration will
(a) Decrease slow ly (b) Decrease rapidly(c) Increase
(d) Rem ain unaffect ed
2.Transpirat ion is m inimised by the deposition of
(a) Cellulose (b) Pect in(c) Cut in
(d) M ucilage
3. Increase in t emperat ure and velocit y of wind cause anincrease in t ranspiration init ially but
lat er it slow s down, because
(a) Of closure of st om at a
(b) W at er is not made available
(c) The air around the plant becom es humid
(d) Of mechanical dist urbance
4. Which one of the following will reduce the rat e oft ranspiration [DPM T 1991; BHU 1991;
(a) Increase in wind velocit y
(b) Rise in t em perat ure
(c) Increase in wat er upt ake by plant s
(d) Decrease in light int ensit y
5. Which of the following is produced during w at er st ress andcauses closure of st omat a
(a) Cytokinin (b) Auxin
(c) GA3
(d) ABA
6.The conditions under which t ranspirat ion w ould be most rapid
(a) High hum idit y(b) Excess of w at er in soil
(c) Low humidit y, high t emperat ure, guard cells are t urgid (open) and m oist soil
(d) Low velocity of wind
7 The t ranspirat ion in plant s will be low est
(a) When t here is high humidit y in the at mosphere
(b) High wind velocit y
(c) There is excess of wat er in the cell
(d) Environm ent al conditions are very dry
8. Phenyl m ercuric acet at e
(a) Reduces t ranspiration rat e
(b) Reduces phot osynthesis
(c) Reduces respirat ion
(d) Kills the plant
9. The rat e of t ranspirat ion direct ly depends on [M P PM T 1990]
(a) Tem perat ure
(b) Negat ive t urgor pressure
(c) Diffusion pressure deficit (d) Vapour pressure gradient
10. Which of the follow ing m ay be used as an anti—t ranspirant in plant
(a) Phenyl m ercuric acet at e (b) Cobalt chloride
(c) M ercury (d) Pot assium
11. Transpiration increase w ith increase in
(a) Hum idit y (b) Tem perat ure
(c) M inerals (d) Soil moisture
12. Under w hat condit ions the rat e of t ranspirat ion increases by
(a) Increase of hum idit y
(b) Increase of at mospheric pressure
(c) Decrease of t em perat ure
(d) Decrease of hum idit y
13. Which w ould do m aximum harm to a t ree
(a) Loss of half of it s branches
(b) Loss of all of it s leaves
(c) Loss of all it s bark
(d) Loss of half of it s leaves
14. A w ell w at ered herbaceous plant exhibit s a decrease in rat eof t ranspiration in int ense light ;
t his is due to
(a) Photo-oxidat ion of chlorophyll
(b) Loss of w at er from the soil
(c) High rat e of phot osynthesis
(d) Part ial closure of stom at a
15.In the t errest rial habit at w hich of t he following fact ors affect t emperat ure and rainfall
condit ions
(a) Translocat ion
(b) Transform at ion(c) Therm o-denaturat ion
(d) Transpirat ion
16. Increase in CO2 concent rat ion around leaf result s in
(a) Rapid opening of stom at a
(b) Part ial closing of st omat a
(c) Complet e closure of stom at a
(d) There will be no effect on st omat a( opening
17.Cobalt chloride m et hod w as first used by
(a) F. Darw in (1912) (b) St ahl (1894)
(c) Curt is (1926)
(d) Leibeg (1840)
18.Which one of the following is not an antit ranspirant
(a) PM A
(b) BAP
(c) Silicon oil (d) Low viscosit y
19.Transpiration can be influenced by int erfering w ith
(a) Air t em perat ure (b) Epiderm is of leaf (c) Guard cell (d) Osm otic pressure
20.Which of the following is not a purpose of t ranspirat ion
(a)Supplies w at er for photosynt hesis(b) Helps in translocation of sugars from source t o sink
(c) M aint ains shape and st ruct ure of the plant s
(d) Cools leaf surfaces
(e) Transport s m inerals from the soil t o all part s of the plant
M ECHANISM OF OPENING AND CLOSING OF STOM ATA
1. Observe t he diagram of st omat al apparatus. In which of thefollowing all the t hree part s
labelled as A, B and C are correct ly ident ified
(a) A - Guard cell, B - St omat al apert ure, C - M icrofibril
(b) A - St omat al apert ure, B - Guard cell, C - M icrofibril
(c) A - M icrofibril, B - Guard cell, C - Stomat al apert ure
(d) A - M icrofibril, B - Stomat al apert ure, C - Guard cell
2. Stom at a on the surface of the leaf, open by
(a) Decreasing t he solut e concent ration in the guard cells
(b) Increasing t he solut e concent rat ion in t he guard cells
(c) Weakening of t he cell w alls of t he guard cells to allowt hem to st ret ch
(d) Increasing t he w at er pot ent ial in the guard cells
3. When st om at a closes w hich of the follow ing event s does not occur
(a) Guard cell becom e flaccid
(b) Sugar is convert ed t o st arch
(c) 0.P of the guard cell decreases
(d) Accum ulation of 0 2 t akes place
4. Select t he correct event s leading t o the opening of the st om at a
(i) Decline in guard cell solut es
(ii) Low ering of osm ot ic potential of guard cells (iii) Rise in pot assium levels in guard cells
(iv) M ovement of w at er from neighbouring cells int o guard cells,
(v) Guard cells becom ing flaccid
(a) (i) and (v) only
(b) (ii), (iii) and (iv) only
(c) (i), (iii) and (iv) only
(d) (ii), (iv) and (v) only
(e) (iii) and (v) only
6.Choose the correct com binat ion of labelling of st omat al apparatus of dicot and monocot leaves
(a) A = epidermal cells, B = subsidiary cells, C = chloroplast , D = guard cells, E = st omat al apert ure
(b) A = epidermal cells, B = guard cells, C = chloroplast , D = subsidiary cells, E = st omat a! apert ure
(c) A = epiderm al cells, B = subsidiary cells, C =chloroplast, D = st omat al apert ure,
E = guard cells
(d) A = subsidiary cells, B = epiderm al cells, C = chloroplast , D = st omat al apert ure, E = guard
cells
(e) A = guard cells, B = epiderm al cells, C = st omatal apert ure, D = subsidiary cells, E = chloroplast
6. The met al ion involved in the st om at a! regulat ion is or'-Stom at a w ill open, if there is
accum ulation of the follow ing elem ent in the guard cells Or
Opening and closing of st omat a is cont rolled by
(a) Iron (Fel (b) M agnesium (M e) (c) Zinc (Zn+) (d) Pot assium (1{1
7. Conversion of st arch t o organic acid is essent ial for
a) Stom at al closure (b) Stom at al opening (c) Stomat a! init iat ion
(d) Stom at al growt h
8.Clarificat ion of m echanism of opening and closing of guard
cells is based on which of the follow ing theory (a) Ent ry and exit of pot assium in guard cell
(b) Photosynt het ic process t aking place in guard cell
(c) St arch—sugar conversion
(d) Transpirat ion
9. Stom at a open during day tim e because t he guard cells
(a) Photosynt hesize and produce osmot ically active sugars or organic acids
(b) Are t hin-walled(c) Are bean shaped(d) Have t o help in gaseous exchange
10. St omat al opening or closing is due t o
(a) Change in t he turgidit y of guard cells(b) The inner w all of each guard cells is thick and elast ic
(c) Cellulose microfibrils of guard cells are orient ed radially (d) All of the above
11. According the St ew ards st arch hydrolysis t heory, w hich oneof the follow ing is the principle
reason for the opening of stom at a during dayt ime
(a) Influx of 1{4 ions into guard cells under the influence of ABA horm one
(b) Conversion of sugar into st arch in guard cells
(c) Efflux of K4 ions from guard cells under the influence ofABA hormone
(d) Phot osynthet ic utilization of CO2 in guard cells
12. When an oak leaf st oma is open more w idely, t he most likely process involved is
(a) W at er m olecules are ent ering in the guard cells t hrough adjacent cells
(b) The at mosphere out side the st om a is becom ing less hum id
(c) Salt m olecules are being excret ed by the adjacent guard cells
(d) Auxins are accumulat ing in t he guard cells
13. Which of the follow ing theories is not relat ed to t he openingof stomat a
+
(a) Sachs
(b)
K t ransport (c) Korper-Kappa theory
(d) Levit t theory
14. No+ K4 pump in a cell is an exam ple of
(a) Osm osis (b) Diffusion(c) Passive t ransport
(d) Active t ransport
15. St omat al opening and closing is due to t he perm eabilit y oft he guard cell. This fact was
revealed by
(a) Von M ohl (b) Linsbauer (c) Lloyd
(d) M ansfield
16. St omat a open in t he dayt im e due t o
(a) Increase in w at er pot ent ial
(b) Decrease in w at er pot ent ial
(c) Decrease in Ph
(d) Light
17. Which of the follow ing st at em ent is not true for st omat alapparat us
(a) Guard cells invariably posses chloroplast s and m itochondria
(b) Guard cells are alw ays surrounded by subsidiary cells
(c) St om at a are involved in gaseous exchange
(d) Inner w alls of guard cells are thick
18. St omat al mechanism operat es in response t o
(a) Tem perat ure
(b) Light
(c) Soil m oist ure
(d) At mospheric humidity
19. Levit t explanat ion for st om atal act ion is due t o
(a) Increase in sugar cont ent of guard cells (b) Variat ions in pH value
(c) St arch is convert ed into organic acids
(d) Light causes opening and darkness closure
20.The primary osm olit e which causes an opening and closingof st om at a is
(a) Sugars
(b) St arch
(c) K-m alat e (d) W at er
21. In guard cells when sugar is convert ed int o st arch, t he stom at a] pore
(a) Opens fully (b) Opens part ially(c) Closes com plet ely (d) Rem ains unchanged
22. Which of the follow ing theory gives t he lat est explanat ion fort he closure of st omat a
(a) ABA theory (b) M unch theory(c) St arch glucose t heory
(d) Active KE t ransport theory
23. Glycolat e induces opening of st omat a in
(a) Presence of oxygen (b) Low CO2 concent rat ion
(c) High CO2 concent rat ion (d) Absence of CO2
24. Basis of stomat al opening is
Or
A plant cell at t ains turgidit y due to
(a) Exosmosis(b) Endosmosis(c) Decrease in cell sap concent ration(d) Plasmolysis of guard cell
GUTTATION – BLEEDING – ROOT PRESSURE
1.Gutt ation is caused due t o
(a) Imbibition (b) Osm osis
(c) Positive root pressure
(d) Transpirat ion
2. Gut t at ion usually occurs w hen the plant is put
(a) In more sat urat ed at mosphere (b) In m ore humid soil(c) In dry condition (d) In desert s
3. Which of the following is not a cont rolled process
(a) Transpirat ion
(b) Gutt at ion (c) Bot h (a) and (b) (d) None of the above
4. From act ive hydathodes, the wat er comes out by
(a) Osm otic pressure (b) Secret ed by force developed w it hin cells them selves
(c) By root pressure d) None of the above
5. Root pressure is due to
(a) Passive t ransport (b) Gravit ation
(c) Active t ransport (d) None of these
6.Which one of t he following is not relat ed to gut tat ion
(a) W at er is given out in t he form of droplet s(b) Wat er given out is impure
(c) Wat er is given out early m orning(d) Gutt ation is of universal occurrence
7. The process of the escape of liquid from the t ip of uninjuredleaf is called
(a) Evaporation
(b) Transpirat ion
(c) Gutt at ion (d) Evapo-t ranspiration
8. Gut t at ion is the process of elim ination of w at er from plant st hrough or Gut t ation occurs from
or The pores in leaves t hrough which w at er comes out in t he form of droplet s are called or A
specialized m ulticellular st ructure in leaves w hich excret es w at er droplet s is called as
(a) Stom at a (b) Hydathodes
(c) Lent icels (d) Wounds
9. Gut t at ion is found most ly in
(a) Herbaceous plant (b) Shrubs
(c) Wood plant s
(d) None of these
10. Wat er is lost in a liquid st at e in som e plant s t hroughhydathodes. These hydathodes
(a) Rem ain closed at night
(b) Rem ain closed during day
(c) Rem ain always open
(d) Do not show any specificit y in opening and closing
11. Epit hem is
(a) Loosely arranged mass of parenchyma in hydat hodes
(b) Large int ercellular spaces of hydathodes
(c) Xylem element s of hydathodes
(d) Phloem below the air chamber
12. Gut t ation occurs in
(a) M orning (b) M oon
(c) Evening
(d) M orning 10 O'clock
13.Hydathodes are also called
[M HCET 2004]
(a) W at er st om at a
(b) Sunken st omat a (c) Guard cells
(d) Subsidiary cells
14. Which one is not relat ed to t ranspirat ion
[M P PM T 1997]
(a) Regulation of plant body t em perat ure(b) Absorption and dist ribut ion of mineral salt s
(c) Circulation of w at er
(d) Bleeding
15. Which of the follow ing is responsible for passive gut t at ion
(a) Tension—cohesion of wat er molecules (b) Activity of epit hem tissue
(c) Osm ot ic act ivit y of root hairs
(d) Secret ion of fluid by m esophyll cells
16. Which of the follow ing is more during t he night
(a) Root pressure (b) Absorpt ion(c) Evaporat ion (d) Transpirat ionand Apparatus concerned
SCIENTIST AND APPARATUS CONCERND
1. Ult rafilt ration theory for permeabilit y of cell membrane w asput fort h by
(a) Traube
(b) Ruhland (c) Sachs
(d) None of these
2. Pressure bomb t echnique w as used by
(a) Scholander et al (b) Kram er et al
(c) Dixon et al
(d) None of the above
3. Who proposed the ret ension pressure t heory for theperm eabilit y of the m em brane
(a) Traube
(b) Overt on(c) Cocking
(d) None of these
4. M at ch the t heories given in column I with t he names ofscient ist s list ed in column II. Choose
t he answ er w hich gives t he correct com bination of t he alphabet s
COLUM N – I
COLUM N –II
NAM E OF THE THEORIES
NAM E OF THE SCIENTISTS
A.Relay pum p thoery
P.St ockings
B.Transpirat ion cohesion theory
Q.Sir.J.C.Bose
C.M ass flow
D.Pulsat ion t heory
R.Godlew ski
S.Dixon and Jolly
T.Ernst M unch
a)A-R, B-S, C-T, D-Q b)A-S, B-R, C-P,D-Q c)A-R, B-Q, C-T, D-S d) A-Q B-P, C-T, D-R
5. Who explained the scotoact ive opening of st omat a
(a) Nishida (b) Palls(c) Ehrler (d) None of the above
6. Theory of st arch—glucose int erconversion w as proposed by
Or
Enzym e phosphorylase is first of all discovered in guard cells by
(a) Yin and Tung (b) Zelit ch(c) Imamura
(d) None of the above
7. For photoact ive opening of stom at a, t he proton t ransport concept w as given by
(a) Levit t (b) M ilborrow (c) Ziegler (d) None of t he above
8. According to one vit al force t heory, ascent of sap is due t oactive pulsation of innerm ost layer
of cortex. This theory w as given by
(a) J. C. Bose (b) Dixon(c) St rasburger
(d) Sacks
9. The scient ist, w ho proposed that product ion of glycolic acidin guard cells is an import ant
fact or in st om atal opening, is
(a) Kum ar (b) St ew ard
(c) Zelit ch
(d) Lewit t
10.Gut t at ion w ord is given by
(a) Frit z
(b) Burgerst ein
(c) Noggle
(d) Lewit t
11.Who studied the effect of light on t ranslocat ion
(a) De Vries (b) Blackman (c) W illiam s (d) Hart
12.Which of the following met hod is adopt ed by plant for the absorption of w at er when a cut
shoot is fit t ed in a pot om et er
(a) Active
(b) Passive
(c) Part ly bot h (d) None of these
13.Pot om et er w orks on the principle of
(a) Amount of w at er absorbed equals the am ount t ranspired
(b) Osmotic pressure(c) Root pressure
(d) Pot ential difference bet w een the t ip of the tube and that of the plant
14.Who had said that " t ranspiration is a necessary evil"
(a) Curtis
(b) St ew ard(c) Andersen
(d) J. C. Bose
15.Osm oscope is used for
(a) M easuring OP(b) M easuring TP(c) M easuring psi(d) Dem onst rat ion of osm osis
16.Which of the following is used to det ermine t he rat e of t ranspirat ion in plants
(a) Porom et er
(b) Potomet er (c) Auxanom eter
(d) Tensiom et er
17.The t erm w at er pot ential was proposed by
(a) Bose
(b) Dixon
(c) Godlew ski (d) Slat yer and Taylor
18.Pot om et er and clinost at are used to study
(M HCET 2001]
(a) Photosynt hesis and respirat ion(b) Transpiration and grow th
(c) Phot ot ropism and geot ropism (d) Transpirat ion and geot ropism
19.Darwin's potom et er det erm ine
(a) Comparison of st om at al and cut icular t ranspirat ion(b) Transpirat ion and absorpt ion ratio
(c) Opening of stom at a(d) None of these
20.The best vit al force t heory w as proposed by
(a) Godlew sky
(b) St rasberger(c) Dixon (d) Esau
21.Who has used t wo bulbs of semipermeable mem brane to explain pressure flow theoryOr
Gradient pressure w as given as a possible m echanism of t ranslocation of food by
(a) M unch
(b) Jones
(c) Spanner (d) Fenson
22.The shoot pressure is measured by
(a) G.M . Count er(b) Luxm et er(c) Pressure bomb technique(d) Bomb calorim et er
23." There is no t ranslocat ion at low t em perat ure" has been invent ed by
(a) Sw anson and Whitne
(b) Fenson(c) Spanner
(d) M unch
TRANSIOCATION OF ORGANIC SOLUTES
1.Who proposed that the upward and downw ard m ovem ent of m at erials t ake place
(a) Sacks
(b)
Boehm(c) Dixon
(d)
Curt is
2.The direct ion of the conduct ion of food through phloem is
(a) From below upw ards
(b) From top to bott om
(c) From leaves t o root s
(d) Phloem never conduct s food
3.In which form t he food is t ranslocat ed from endosperm t o plumule of a fat t y seed like cast or
(a) Fatt y acids
(b) Fat
(c) Glucose
(d) Sucrose
4.Chem ical analysis of phloem show s the presence of
(a) M ore amount of carbohydrat es (b) Organic nit rogenous com pounds
(c) M inerals
(d) Bot h (a) and (b)
5.Phloem sap is m ainly made of
(a) W at er and sucrose(b) Wat er and m inerals
(c) Oligosaccharides and hormones (d) None of these
6.The absorpt ion of food in phloem is
(a) Basipet al (b) Acropet al (c) Bot h (a) and (b) (d) None of these
7.The food st ored in the ripening fruit is derived from
(a) Root s
(b) Fart hest leaves (c) Nearest leaves
(d) Aerial st em
8.In cell t ransport the difference bet w een perm eable t ransport and bulk t ransport relat es t o
(a) St ructure of molecules allow ed t o pass through
(b) Solvent syst em as w ell as st ructure of m olecules areapplicable
(c) Solvent syst em is applicable
(d) M olecular w eight of atom s allow ed t o pass through
9.Sinks are relat ed t o [M P PM T 1997]
(a) Transport of minerals
(b) Stom at a(c) Enzymes
(d) Phyt ochrome
10. Consider the followingst at ement s wit h reference t o facilit at ed t ransport
A. Requires ATP energy
B. Transport Saturat es
C. Highly select ive
D. Requires special m em brane propert ies
E. Uphill t ransport
Of t he above st at em ent s
(a) A, B and C, are relevant but D and E are irrelevant
(b) B, C and E, are relevant but A and D are irrelevant
(c) C, D and E are relevant but A and B are irrelevant
(d) A, D, and E are relevant but B and C are irrelevant
(e) B, C and D are relevant but A and E are irrelevant
11.Bidirect ional t ranslocat ion of minerals t akes place in
Or
By m any evidences, it can be known that the downw ard movem ent of food t akes place through
(a) Xylem
(b) Phloem
(c) Parenchym a
(d) Cambium
12. Leaf photosynthat es are t ransport ed t o other part s of higherplant s t hrough Or
Food is t ransport ed to various part s of the plant through
(a) Cam bial cells
(b) Pith cells (c) Xylem cells
(d) Phloem cells
13. Which is correct about t ransport or conduct ion of subst ances
(a) Organic food moves upw ardly t hrough xylem (b) Organic food moves up through phloem
(c) Inorganic food moves upw ardly
and dow nw ardlythrough xylem
(d) Organic food moves
upw ardly
and downw ardlyt hrough phloem
14. During t ransport of sugar or amino acid t hrough cell m embrane
(a) Na+ ions m ove against the direct ion of concent rat ion gradient
(b) Na+ ions m ove in both direct ions irrespect ive of it s concent ration gradient
(c) No net Na+ ions m ovement
(d) Na+ ions m ove in t he direct ion of it s concent rat ion gradient
15. By protoplasm ic st ream ing theory, how sugar is t ranslocat edfrom one sieve t ube t o ot her
(a) Diffusion (b) Osm osis(c) Absorption
(d) Active t ransport
16.Supply ends in t ransport of solut e are
(a) Green leaves and storage organs
(b) Root and st em
(c) Xylem and Phloem
(d) Hormones and enzym es
17.The movem ent of mat erials t hrough t he vascular t issue of plant s is called
(a) Transpirat ion
(b) Translocat ion(c) Transcript ion (d) Transduct ion
18.According to all M unch's pressure-flow hypot hesis, w hich of the follow ing given condit ions
w ould increase t he rat e oft ranslocation
(a)
A decrease in the photosynt hesis
(b) An increase in the sucrose product ion at the source
(c) A decrease in phloem unloading at the sink
(d) An increase in the humidit y in the out side air
19. Act ive t ransport of solut e in plant s refers t o flow of solut esagainst a concent rat ion gradient
and therefore requires input of energy. This energy is derived
(a) Alw ays from hydrolysis of ATP
(b) Not only from ATP hydrolysis but also from the collapse of a proton motive force
(c) Partly form t he input from ATP hydrolysis and part ly from the collapse of a proton m otive
force
(d) From the different sources depending on the solut es
20. When a plant is girdled or In a ring girdled plant
(a) The root dies first (b) The shoot dies first
(c) The root and shoot die at the sam e t im e(d) Neither t he root nor the shoot w ill die
21. The carbohydrat es synt hesized in the leaves are t ransport edthrough sieve t ubes m ost
com monly in the form of
Or
Translocat ion of sugar in flow ering plant s occurs in t he form of
(a) Glucose (b) Triose sugar
(c) Sucrose
(d) Soluble st arch
22. St arch is insoluble in w at er yet it is accumulated in largequant it ies in pot ato because
(a) It is synthesized in pot at o tuber it self
(b) It is t ranslocat ed from t he leaves t o t he pot ato t uber in t he form of sugar
(c) Soil micro-organism deposit st arch in tuber(d) It is useful consumption
23.According to M unch t heory, t he cause of flow of solublesubst ances is
(a) Prot oplasmic flow
(b) M ass flow due to reduct ion in t urgor pressure
(c) Diffusion
(d) None of these
24.The t ranslocation of organic solut es in sieve t ube m em bers issupport ed by
(a) M ass flow involving a carrier and ATP (b) Cyt oplasmic st reaming
(c) Root pressure and t ranspirat ion pull
(d) P-prot eins
25. Who proposed blood like t ranslocat ion of solut es
(a) Spanner (b) M unch
(c) Williams (d) Jones
26. Organic subst ances such as sugars are translocat ed inphloem can be demonst rat ed by
(a) Defoliation
(b) Ringing the st em (c) Graft ing
(d) Root pressure
27. Vein loading is the active t ransport of sugars from
(a) M esophyll cells t o vessels
(b) Vessels t o m esophyll cells
(c) M esophyll cells to sieve t ubes
(d) Sieve t ubes to m esophyll cells
28. M unch hypothesis is based on
(a) Translocat ion of food due t o TP gradient and imbibit ion force
(b) Translocat ion of food due to Turgor Pressure (TP)gradient
(c) Translocation of food due t o im bibition force
(d) None of the above
29. Which one of the follow ing elem ent s is necessary for t het ranslocat ion of sugars in plant s
(a) Iron
(b) M anganese
(c) M olybdenum
(d) Boron
30. Which of the follow ing is the m ain point in disfavour ofM unch theory
(a) Translocat ion is a pure physiological process(b) Translocation is a pure physical process
(c) Explainat ion of sugar t ransport is not given
(d) None of these
31. Which of the following crit eria does not pert ain t ofacillitat ed t ransport
(a) Uphill t ransport (b) Requirement of special m embrane prot eins
(c) High select ivit y
(d) Transport saturat ion
32. The figure indicat es t he ringing or girdling experim ent . Barkhaving phloem is rem oved. This
experim ent proves t hat phloem is the path for t ranslocation of food. In this experim ent
sw ollen part of st em has been shown. The possible cause of t his swollen
(a) Injured part s undergo turgidit y
(b) A repairing m echanism is t aken place
(c) Accumulation of w at er and mineral just above the ring
(d) Accumulation of food m at erial just above t he ring (Asdownw ard movem ent of food is
inhibit ed)
Which of the following stat ement s does not apply to reverse osmosis
(a) It is used for w at er purificat ion
(b) In this t echnique, pressure great er t han osm ot icpressure is applied to the syst em
(c) It is a passive process
(d) It is an act ive process
2. Which one of the following will not direct ly affect t ranspirat ion
(a) Tem perat ure(b) Light (c) Wind speed(d) Chlorophyll cont ent of leaves
3. The lower surface of leaf w ill have more number of stom at ain a
(a) Dorsivent ral leaf (b) Isobilat eral leaf(c) Bot h a and b (d) None of the above
4. The process of gut t at ion t akes place
(a) W hen the root pressure is high and the rat e of t ranspiration is low
(b) When t he root pressure is low and the rate of t ranspirat ion is high
(c) When the root pressure equals the rat e of t ranspirat ion
(d) When the root pressure as w ell as rat e of t ranspirat ionare high
5. Which of the following is an exam ple of imbibit ion
(a) Upt ake of w at er by root hair
(b) Exchange of gases in st omat a
(c) Sw elling of seed w hen put in soil
(d) Opening of st om ata
6.Wat er pot ential of pure w at er at st andard t em perat ure is equal t o
(a) 10 (b) 20 (c) Zero (d) None of the above
7. M at ch the follow ings and choose t he correct opt ion
COLUM N – I
A.Leaves
B.Seeds
C.Root s
D.Aspirin
E.Plasmolysed cell
a)A-III B-IV C-I, D-II
COLUM N – II
I.Ant it ransparint
II.Transpirat ion
III.Negat ive osmotic pot ent ial
IV.Imbibit ion
V.Absorption
b)A-I, B-II, C-III, D-IV c)A-III, B-II, C-IV, D-I d)A-III, B-II, C-I, D-IV
8. M ark the m ism at ched pair
(a) Amyloplast i.
(b) Elaioplast
ii.
(c) Chloroplast s
iii.
(d) Chromoplast s
iv.
(e) Leucoplast
v.
St ore prot ein granule
St ore oils or fat s
Cont ain chlorophyll pigment s
Cont ain coloured Pigment s other t hanchlorophyll
Cont ains colourlesspigment s
EXERCISE - 2
1. Purple cabbage leaves do not loose t heir colour in coldw at er but do so in boiling w at er
because
(a) Plasma m em brane get inactivat ed in boiling wat er
(b) Hot w at er can ent er t he cells readily
(c) The pigment is not soluble in cold w at er
(d) The cell w all is killed in boiling w at er
2. Primary and secondary act ive t ransport bot h
(a) Generat e ATP
(b) Use ATP direct ly
(c) Can move solut es against their concent ration gradient
(d) Include the passive m ovem ent of glucose m olecule
3. When a plant cell is placed in a solut ion w hich is hypotonicto the cell sap, w hich of the
following condit ions will not apply
(a) The w at er pot ential of the cell sap w ill rise(b) The suct ion pressure of the cell sap will fail
(c) The cell will become turgid
(d) The w all pressure of the cell will fail
4. 0.5 M sucrose solution develops a pressure of 15 bars in anosm om et er. Which of the following
st at em ent is w rong for such a solut ion
(a) That its osm otic pot ential is — 15 bars (b) That it s wat er pot ential is — 15 bars
(c) That it s pressure pot ent ial is — 15 bars (d) That it s osmotic pressure is + 15 bars
5.A cell when dipped in 0.5 M sucrose solut ion has no effect but when the same cell w ill be
dipped in 0.5 M NaCI solution the cell will
(a) Increase in size
(b) Decrease in size (c) Will be t urgid
(d) Will get plasmolysed
6. In which of the following plant s would m et abolism behindered if the leaves are coat ed w it h
w ax on t heir upper surface
(a) Hydriila
(b) Lotus
(c) Pist ia
(d) Vailisneria
7.An osm om et er is filled with 0.5 M solution of NaC1 in w at er. In which of the follow ing solut ions
it must be im m ersed inorder t o m ake it shrink
(a) 0.5 M solution (b) 0.05 M solut ion(c) Dist illed wat er
(d) 0.75 M solut ion
8.In w at er—logged soil, plant s do not grow properly because
(a) The soil is physiologically dry
(b) The soil is physiologically w et
(c) Due to excessive wat er
(d) Due to short age of w at er
9.Turgidit y in guard cells is cont rolled by
(a) Chloride(b) M alic acid(c) Pot assium (d) Pot assium , chloride and m alic acid
10.Root pressure is m axim um w hen
(a) Transpirat ion is high and absorpt ion is very low
(b) Transpirat ion is very low and absorpt ion is high
(c) Transpirat ion is very high and absorpt ion is also high
(d) Transpirat ion and absorpt ion both are slow
11.In which of t he follow ing the rat e of t ranspirat ion is high
(a) CAM plant s
(b) C3 plant s (c)
C3 and C4 plant s
(d) C4 plant s
12. A thin film of w at er, held by the soil particles under theinfluence of int ernal att ract ive force,
is called which of t he following w at er
(a) Capillary (b) Combined(c) Hygroscopic
(d) Gravit ational
13. A sufficient at mospheric pressure required t o push t he w at erupto t he t op of t all plant s must
be
(a) 2 at m (b) 6 at m(c) 20 at m
(d) All of the above
14. Choose t he correct combination of labelling of the pot atoosmoscope experim ent
(a) a-final level, b-dotpin, c-initial level, d-sugar solut ion, e-pot ato tuber
(b) a-init ial level, b-dotpin, c-final level, d-wat er, e-pot at o tuber
(c) a-final level, b-dotpin, c-initial level, d-wat er, e-pot ato t uber
(d) a-final level, b-dotpin, c-final level, d-w at er, e-container
(e) a-initial level, b-dotpin, c-final level, d-coconut oil,e-pot at o tuber
15. Choose t he correct combination of labelling of hydathode
(a) A-guard cells, B-epithem , C-mesophyll, D-epiderm is, E-vasculat ure
(b) A-guard cells, B-epiderm is, C-mesophyll, D-epithem , E-vasculat ure
(c) A-ostiole, B-epidermis, C-mesophyll, D-epithem ,E-vasculat ure
(d) A-wat er pore, B-hypoderm is, C-mesophyll, D-epit hem , E-vasculat ure
16. The removal of a ring of bark from t runk of a tree event uallykills it, since
(a) M ineral salt s cannot go up
(b) W at er cannot go up
(c) Food does not t ravel down and root s are st arved
(d) The exposed part becomes infect ed w it h fungi
17. Where does t ranspiration cohesion pull t heory works
(a) Active absorpt ion
(b) Inactive absorption
(c) Active and inact ive absorpt ion (d) None of these
18. The speed of w at er absorpt ion w ill be great er if
(a) The difference bet w een osmotic pressure of soil w at er and that of xylem vessels is alw ays
less
(b) The difference bet w een osmotic pressure of soil w at er and that of xylem vessels is alw ays
m ore
(c) The osmotic pressure of soil w at er is alw ays more t han t hat of xylem vessels
(d) The osm otic pressure of soil w ater is always less t han that of xylem vessels
19. During absorpt ion of H2O by root s, the H2O pot ent ial of cell sap is low er t han that of
(a) Solution out side (b) That of pure H2O(c) One (d) None of these
20. See t he follow ing figure and select t he correct opt ion
(a)
Wat er pot ent ial has nothing t o do
w ith K.E.
of w at er in a solution
(b) K.E. of w at er in A solution = K.E. of H2O in B solution
(c) K.E. of w at er in B solution > K.E. of w at er in A solution
(d) Kinet ic energy (K.E.) of H2O in A solut ion> K.E. of w at er in B solut ion
21.See t he follow ing diagram of four plant cells. Select t hecorrect opt ion in w hich cells w ould
not exit w all pressure
(a) R and S
(b) P and R (c) Q and S (d) P and Q
22.The given diagram show s t he t ransport at ion of m at erials by
(a) Secondary active t ransport (b) Prim ary act ive t ransport
(c) Facilit at ed diffusion (d) Sim ple diffusion
23. The given diagram illust rat es a Pot ato plant form ing newt ubers. Which rout e would be
t aken by most of the food at t his t ime
24. The experim ent given below show s groups of pot ato discw ere w eighed and then each
group w as im mersed in one of a series of sucrose solut ions. Aft er t wo hours each group was
rew eighed and it s percent age gain or loss in w eight w as calculat ed
The given graph shows the result plot t ed as point
From these result s it can be
concluded that the w at er concent rat ion of pot ato cell sap is approxim at ely equivalent
t o that of a sucrose solut ion of molarit y
(a) 0.50 (b) 0.35(c) 0.25 (d) 0.10