Code No. 57/2/3
Roll No.
SET 3
INDIAN SCHOOL AL WADI AL KABIR
FINAL ASSESSMENT 2015-16
CLASS XI
Biology (044)
23.2.16
M.M:70
Time: 3 Hrs.
INSTRUCTIONS
1. This paper has six sections, A, B, C, D, E & F
2. Section A carries 1 mark each, Section B carries 2 mark each, Section C carries 3 mark each
Section D 4 marks, Section E carries 5 mark each and Section F has otba questions.
3. There is one choice in section B & C while section E has all choices but no overall choice.
4. Wherever necessary, the diagrams should be drawn & neatly labeled.
SECTION A
1. If for any reason , the release of ADH is inhibited, how will this affect the volume of urine
produced
2.Which symbiotic organism is a very good pollution indicator
3. Which group comprises of single celled eukaryotes only ?
4. What is the difference between Botanical Garden and Herbarium ?
5. Name the tissue represented by the jute fibres used for making the ropes.
SECTION B
6. What is a mesosome in a prokaryotic cell, mention the functions it performs.
Or
Name the type of root for the following :
(a) Roots performing the function of photosynthesis.
(b) Roots come above the surface of the soil to absorb air.
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(c) The pillar like roots developed from lateral branches for providing mechanical support.
(d) Roots coming out of the lower nodes of the stem and provide the support to the plant.
7. Explain competitive inhibition along with an example.
8. When any dry plant material or seeds are kept in water, they swell up.
(a) Name the phenomenon involved in this change.
(b) Define this phenomenon.
(c) Give two conditions essential for the phenomenon to occur.
9.
10.Briefly explain the secondary & tertiary structure of proteins.
Section c
11. Give reasons for the following:
a) Cow dung is used in the preparation of biogas.
b) Viruses are obligate parasites.
12. Differentiate between the following:
a) Bony fishes & Cartilagenous fishes
b) Chordates & Non Chordates.
13. Explain Watson-Crick model on DNA structure
14. (a) What is plasmid ? What is its importance ?
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(b) Diagrammatically represent the types of chromosomes based on the position of centromere
(15.a) Suppose you are examining a cross section of a stem under compound microscope, how
would you determine whether it is monocot stem or dicot stem ?
b)Briefly explain the formation of the cambium ring.
16. Give the scientific term for the following statements/processes :
(a) Movement of water in roots through the cell wall exclusively.
(b) The positive hydrostatic pressure developed inside the cell or cell wall.
(c) A solution having relatively less concentration.
(d) Loss of water vapour from the aerial parts of the plants in the form of water vapour.
(e) Movement of a molecule across a membrane independent of other molecule.
(f) Water loss in its liquid phase through the special openings of veins near the tip of leaves of
many herbaceous plants.
17.a).
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b) How is the C4 pathway in a paddy plant , advantageous to the plant ?
18. Describe the pressure flow hypothesis of translocation of sugar in plants..
19.Draw neat & labeled of
a) longitudinal section of the kidney
or
b)An actin & myosin filaments.
21.a) With the help of diagram show the genital openings present on the ventral surface of the
earthworm.
b)Distinguish between a male & female cockroach
SECTION D
22. A pregnant lady is detected of hypothyroidism by her doctor, this is a serious concern to
both, her and her doctor
i) How could this affect her baby, briefly explain
ii)How could deficiency of iodine in the diet cause hypothyroidism.
iii)Name the hormone secreted by this gland and state any one function of this hormone.
iv) Which value is depicted by the doctor.
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SECTION E
23.a) Represent the cyclic & non cyclic photophosphorylation scheme of light reaction.
b) Differenciate between the two.
Or
a) Explain with diagram the pathways of water movement in the root.
b) With diagrams show how root nodules are formed in leguminous plants.
24.a) Draw the life cycle of an angiosperm.
b) Explain the process of double fertilization
Or
a)Draw the life cycle of a Pteridophytes.
b) how is leafy stage formed in mosses ? How is it different from protonema ?
SECTION F
25) otba
26) otba
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