NAME: ---------------------------------------------
1 ~ I Enzymes
are important since they:
, a) keep the cell membrane of organisms fluid over a wider temperature'\
b) raise the activation energy, causing reactions to occur much faster X
@ range lower the activation energy, causing reactions to occur much faster./
d) help to build up molecules, but do not allow the breakdown of molecules X.
e) can withstand extreme conditions without losing theirfunctionX
20. What functional group(s) are present (and identified) in the diagram below?
J~carbonyl group and amino group
~ ydroxyl group and carboxyl group
c) carbonyl group and hydroxyl group d) carboxyl group and amino group ,/
"
H
H-{'-€y
j[-C -
O II
I
I l -C I
O ![
o
H
H H
H
H
H H
!
c --,-- C-- ---C'~C- C- ---C"-- -C - -C·'-H
'.
.
:
HO
,
H
H
H
H
H
H
H
II
21. If enzymes could not be used during a reaction, which of the following could
be added to a system to make the reaction occur faster?
a) substrate 'I.
'
@ energy, possibly in the form of heat V c) , product y.. d) water 'A e) none of the choices are correct 22. Which form of energy is NOT correctly associated with an example?
/a)) kinetic energy: fat molecules
~ kinetic-energy: movement of muscles'x
c) chemica l energy: glucose d} potential energy: water held behind a da e) potential energy: ATP 1\ 5
NAME: ______________________________________~_______
23. Which best describes the first law of thermodynamics?
/~ Energy is not created nor destroyed, but it can change into matter.
..,(E]) Energy is not created nor destroyed, but it can change from one energy
form to
another.
c) Energy can be created from matter or used to produce matter.
~ d) Some useful energy is lost as heat whenever an energy transfer occurs.
Energy transfers are always 100% efficient in changing energy from one
useful form to another.
Ie)
24. Which best describes the second law of thermodynamics?
a) Energy is not created nor destroye~, but it can change into matter.X
~ ) Energy is not created nor destroyed, but it can change from one energy
form to another.
c) Energy can be created from matter or used to produce matter.!'
Some useful energy is lost as heat whenever an energy transfer occurs.
e) Energy transfers are always 100% efficient in changing energy from one
useful form to another.X
&
25. While eating a container of yogurt, you have to leave, so you store the yogurt
in the refrigerator. A day later you return and find the surface of the yogurt is
no longer smooth but has broken into several liquified products. You correctly
guess that enzymes from your saliva, via the spoon, have continued digesting
the yogurt in Iyour absence. What will happen over time? .
a) The reaction will soon stop because the amount of saliva is small, and you
would have to add more saliva to continue the degradation.
The reaction will continue indefinitely since the enzyme is not consumed
by thereaction. J
c) The reaction will continue until half is digested and then stop because the
reaction between substrate and product will be' balanced.
d) Absolutely no degradation of the yogurt will occur naturally unless in the
presence of this enzyme. X
e) The reaction will stop because the enzyme will be denatured in the
refrigerator. X
®
NAME:
(
R,t~
~O.r
PART B: Compare and Contrast (6 marks) (K/U)
Choose any TWO PAIRS of terms below (highlight them), and discuss ONE similarity and
TWO differences between each 'pair of terms. Be as specific and as detailed as possible
(no generalizations).
glycogen and cellulose
hypertonic and hypotonic
triglyceride ,!nd phospholipid
. paJV;Oe' n<1I~~
e
o.ncl holcl
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PART C: Diagrams (6 marks) (K/U )
Identify each molecule below, and write the specific name of the structure in the space
provided.
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H
\
R
I
0
II
N-C-C
/
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b)
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---- - -- - -- - -- -
-
- - -- -- - --
---
--
-
NAME: ________________________________________________ d)
c)
HHHHHHHHH
O"
1
1
1
I
I
1
1
1
1
C-C-C-C-C-C-C-C-C-C-H
0/
1
1
I
1
1
1
1
I" 1
H H H H H H H H H
I
H
deoxyribose sug ar
....1
e)
(a)
/
f)
()
HHHHHHHHHHHHHHH
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,
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C -C -C -C -C -C -(' -(' -C -(' -(' -(' -C -C -C -(,-H
H-('-O'"
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H H
1-;' l( 1-;' l( 1-;' l( 1-;' l( 11 ~ ~ ~ ~ ~ I(
(' -c -(' -c -(' -(' -(' -(' -c -(' -(' -(' -C -(' -(' -(,-H
I
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NAM E:
«i to. KlAMo,(
PART D: Short Answer (10 marks)(K/U)
Give an example (a pair of substances) for
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re. 6 ~'r\cl B r-es~(:-hllt· ( ,clW:
2. I ~I~~nWfy aSnd fho"r'ough ly" describe-R'b~ an9 T~ctf:ctors affect enzyme activity.
. r.:>
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(2 marks) (K/U)
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t\cvJ dee \. ·:
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NAME : _____________________________________________ 3. In this unit we studied many examples of dehydration synthesis reactions. Using the
diagram below show how these molecules will undergo dehydration synthesis to
form a disaccharide. Redraw the molecules labeling all substances that are added or
removed, and include the names of the reactants and product. (4 marks)(KjU)
T
-~
H1 0
hl~\ \(
l"~
I
i'
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r lljy ~ J >,(l,L.
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rPc£-\-oms~ ~ e'lACose
c."ol.
~'. ucose
prDr"J'r'h~ \\~!}~~ .' ~' (\ "a~IdJc:k
'fY'l'oJ c.lJ It
4. Name 4 components of the cell membrane other than phospholipids. Explain the
function of each (4 marks) (KjU) .
i~(Q\ {l0-teir6. ~r.f·t"(l f'" ,(',5: Cf\ o-\ corneV' p",-k;I')S both ~fr~(lerlcl'('l ('tIOktJ..Ms...fk~
()'(\ cl~n''':l1S \ft.\>fr~e"ble. c{'H f{leJrI\ore.(\~1
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re31A(OIn"3
PC~'rR~\ ()ro-kl~ '. CO"
MVi"I
-the
cell
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10
- - - - - - - - - - - - - -- - - - - -
---~
-
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NAME: ___________________________________________
PART E: Inquiry (13 marks)(l)
1. A friend of yours conducted an experiment to understand the ideas of osmosis.
He tested celery pieces in 3different sugar solutions. His results are in the table
below.
Measurements of 3 Celery Pieces in 3 Different Sugar Solutions over a 24 hour
Period
Test
Condition
0.00 M
0.50 M
1.00 M
Initial
Width
(mm)
14.3 .
15.5
13.0
Final
Width
(mm)
15.7
15.6 .
11.8
Initial
Length
(mm)
45.5
41.2
47.8
Final
Length
(mm)
47.2
41.3
45.8
initial
Mass
(g)
27.5
25.3
27.3
Final
Mass
(g)
29.7
25.2
25.9
a} Analyze the information by creating a bar graph of the results for length.
(4 marks)(l)
0.50
1,00
;jCooU'Okubo C\ yt Suey ( M)
b} What is the dependent nd what is the independent variable? (2 marks){l}
.~
De.pe(\Jrn-i--r I'\~~~(\den+-
vc,rl~\'\e +h~ vo.( \ob\e
OIl I
o\'j~ ~~c
.
~c.~ ~ £. -\-\.,v~ is bl? '{\J ob&ervecl DInt>\. (()~o...,vrt'd
.\
:\-~e '~d ~ ~'")~ on ~ eJ 1 ~ ;S
(\0+
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\1
NAME: ____________________________________________
c} Describe what happens to an individual celery cell when placed in each of the test
solutions, and why this happens. (3 marks){l}
Solution
1.00M
What
happened?
the
~
"
~.Ir.
Explanation
2. Another friend of yours is interested in studying the effect of temperature and
enzyme concentration on catalase activity. Briefly explain how your friend could set
up their experiment. (4 marks) (I)
.JeMpl p;>vr 30~ vf i-l)O.z . 'io Co heo.i4'f..
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iJ,o f> c pc.r,rlrA:> pc-d·, bee- tee
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(l) M
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e
., \ Z' NAME: ____________________________________________
PART F: Application Questions (7 marks)
1. When a person hyperventilates, the pH of the blood increases. Why would this change
in pH be dangerous? (2 marks)(A)
~ boddl c\~f'o,h-1r;{\~ t~-CM. ·
the r,cYlS"')~ \1 ~ c.. \ b f' ty.~, if ' ~
(S9' (\·h o,l -h I""~
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es )
.11
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wlo -\t.e -e
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f'
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2. Your gums are swollen, and your friend recommends that you swish saltwater around
in your mouth . How and why will this help you? (2 marks)(A) ~\<NcJO ',- C' I",Jf!'(!--b(l~C .... Ie·.. , . \r.~
. . 1'1 I':'
v~ ·
,1(' W ~4H !N,ll . c\\~fv~ ~t 0( Y'I\~ jl.l~ Iflb 1~ St-1-hNa,..
C.o..\A$\fI~ t.rtnCA'ho'f j, t.. .Jhlch \,~\[I bcl(\~ IY'j ~(...tN1SCt- 0 ' al.
.
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NAME: __________________________________________________ 3. Everyone, especially vegetarians, need to be careful in planning their diet, especially ,r---­
when considering amino acids. Explain why this is the case, and why vegetarians in
particular need to be more thoughtful about what they eat. (3 marks) (A)
Pro-ttlnS o.~ eS- " rt \
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Communication
5. "· 1
Use of scientific
tenninology, symbols,
conventions, standard
SI units. Organization
and clear
communication .
Level 2
LE:vel1
5.5
I
6
Communicated with
LIMITED clarity
accuracy
6
I
6.5
Level 3
I
7
Communicated with
SOME clarity and
accuracy
7
. I"
7.5
Level 4
I
8
8.5
Communicated witiJ
CONSIDERABLE
accuracy
I
9
Il
-­ -=­. . . .
10
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)
Communicated with a
HIGH DEGREE of
accuracy
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----------------------------.----------------------------------------------------------------~~