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CONFIDENTIAL
SULTAN lORIS EDUCATION UNIVERSITY
UNIVERSITI PENDIDIKAN SULTAN lORIS
FINAL EXAMINATION
SEMESTER 1 SESSION 2015/2016
CODE
:
DATE:
SBU3013
COURSE
2 9 DEC 2015
DURATION: 2 HOURS 30 MINUTES
:
BIOLOGY I
INSTRUCTIONS
(2) sections: A, and B.
Section A consists of FOURTY (40) multiple choice questions. Answer all questions in
Section A in OMR form provided.
Section B consists of FOUR (4) structure questions. Answer all questions in Section B
this question paper.
1. This
2.
3.
consists of TWO
question paper
in
4. Question paper will be collected at the end of the examination.
This
question paper contains of
21 pages
including
cover
page
PROGRAMME:
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YEAR:
CLASS GROUP:
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REGISTRATION NO:
IDENTITY CARD NO
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LECTURER: DR. HANISOM ABDULLAH
DR. REMMY KEONG BUN POH
DO NOT OPEN THIS QUESTION PAPER UNTIL YOU ARE TOLD TO DO SO
CONFIDENTIAL
SBU3013 Biology I
2
SECTION A
(40 marks)
Instruction: Answer all questions.
1.
Energy
A.
of activation
requires the
use
_
of enzymes
B. allows for feedback inhibition
products of metabolic reactions
D. is the energy required for molecules to react with each other
C. acts
2.
on
the
The concentration of calcium in
surrounding
a
cell is 3%. The concentration of calcium in the
fluid is 1 %. How could the cell obtains
more
calcium?
A. Diffusion
B. Osmosis
C.
Pinocytosis
D. Active
3.
transport
Considering the ATP cycle, which
to perform work for cell activities?
of the
following
would have the most
potential energy
A. ATP
B.ADP
C.AMP
D. Adenosine
4.
via active transport. What would
mitochondria within these intestinal cells are destroyed?
Intestinal cells absorb
glucose
happen
if all the
A. Glucose absorption would increase
B. Glucose absorption would decrease
C. Glucose absorption would not be affected
D. Glucose absorption would be slow at first and then increase
[See next page
SBU3013
Biology
5.
3
I
Celery
stalks that
are
immersed in fresh water for several hours will become stiff and
hard. Similar stalks left in
deduce that the cells of the
A.
B.
C.
D.
6.
a
salt solution will become
celery stalks
are
limp and
soft. From this
we can
_
hypotonic to both fresh water and the salt solution
hypertonic to both fresh water and the salt solution
hypertonic to fresh water but hypotonic to the salt solution
hypotonic to fresh water but hypertonic to the salt solution
cytoplasm has a concentration of 0.02 M glucose is placed in a test tube of
water containing 0.02 M glucose. Assuming that glucose is not actively transported into
the cell, which of the following terms describes the tonicity of the external solution
relative to the cytoplasm of the cell?
A cell whose
A.
Turgid
B. Isotonic
C. Flaccid
D.
Hypotonic
1
A+B
e.
f
d.
m
u.
C+D
Progress of the Reaelion
Figure
7.
______....
1
Which of the following term best describes the reaction shown in figure 1?
A.
B.
Endergonic
Exergonic
C. Anabolic
D. Allosteric
[See
next page
4
SBU3013 Biology I
8.
Which of the
following
is
likely to
increase the concentration of ATP in
a
cell?
A. Anabolic activity in the cell increased.
B. Catabolic activity in the cell increased.
C. Influx of cofactor molecules increased.
D. Amino acid concentration increased.
9.
White blood cells engulf bacteria through
_
A. osmosis
B.
pinocytosis
C. exocytosis
D. phagocytosis
seriously epidemic viral diseases of earlier centuries
because they resulted in severe dehydration due to vomiting and
are mostly not fatal because scientists have developed
10. Several
were
then incurable
diarrhea.
Today, they
_
A. medication to prevent blood loss
B. antibiotics against the viruses in question
C.
high
concentrations of salts and
glucose drinks
D. antiviral medications that are efficient and work well with all viruses
11. The
light
reactions act much
energy is stored
A. ADP
+
as
as a
battery to
power the reactions of the Calvin
cycle. This
_
Pi
B. ATP and NADPH
C. ADP
+
Pi and NADP+
D. NADPH and NADP+
cycle
of glucose?
12. How many
in the Calvin
cycle would
be
required for
a
plant to
make
one
molecule
A.1
B. 3
C.6
D.12
[See next page
:BU3013
Biology
13.
5
I
is reduced.
is oxidized, while
During photosynthesis,
A. water; carbon dioxide
8. carbon dioxide; water
C.
carbohydrate; carbon dioxide
carbohydrate
D. carbon dioxide;
14. The Calvin cycle reactions
A.
so
that
they
are
only
adjacent
occur
in bundle sheath cells in
a
C4 plant
_
to stomata
8. to allow O2 to enter bundle sheath cells
C. because rubisco is only found in mesophyll cells
D. to shield the Calvin
15. What
are
the
cycle reactions from O2 in
products of
the leaf spaces
linear photophosphorylation?
A. ADP and P680
8. ATP and P700
C. ADP and NADP
D. ATP and NADPH
thylakoid is somehow punctured so that the interior of the thylakoid is
most direct effect
longer separated from the stroma. This damage will have the
16. Assume
a
splitting of water
8. the synthesis of ATP
C. the absorption of light
no
on
A. the
energy
by chlorophyll
D. the flow of electrons from photosystem II to photosystem I
17. The chemiosmotic process in
A. establishment of
a
chloroplasts involves
_
proton gradient
8. reduction of water to produce ATP energy
C. diffusion of electrons through the thylakoid membrane
D. movement of water
by
osmosis into the
thylakoid space from the
stroma
[See next page
6
SBU3013 Biology I
protein complex for the light reaction (a reaction center), energy is transferred from
one pigment molecule to another pigment molecule until it reaches the primary electron
acceptor. Which of the following statement best describe the occurrence of this process?
18. In
a
potential energy of the electron has to go back to the ground state.
B. Each pigment molecule has to be able to act independently to excite electrons.
C. The action spectrum of that molecule is such that it is different from other molecules
of chlorophyll.
D. The molecular environment lets it boost an electron to a higher energy level and also
A. The
to transfer the electron to another molecule.
19. In the process of carbon fixation, RuBP attaches a CO2 to produce a 6 carbon molecule,
which is then split in two. What is the next step in Calvin cycle after phosphorylation and
reduction?
Regeneration of rubisco.
Regeneration of ATP from ADP.
C. Inactivation of RuBP carboxylase enzyme.
D. Addition of a pair of electrons from NADPH.
A.
B.
20. CAM plants
happen
keep
stomata closed in
because CAM
plants
daytime
to reduce loss of water. This process could
_
CO2 into organic acids during the night
B. fix CO2 into pyruvate in the mesophyll cell
C. fix CO2 into sugars in the bundle-sheath cells
D. use the enzyme phosphofructokinase, which outcompetes rubisco for CO2
A. fix
21. What is the process that
uses
oxygen to break food down and produce ATP at cellular
level?
A.
Photosynthesis
respiration
B. Cellular
C. Reduction reactions
D. Oxidation reactions
[See next page
:BU3013
Biology
7
I
22. What is the opposite process of cellular respiration?
A.
Hydrolysis
B.
Fermentation
C. Photosynthesis
D.
Dehydration synthesis
Figure
23. In
figure 2,
labelled X represents
2
of
a
mitochondrion.
A. cristae
B. thylakoids
C. mitochondrial matrix
D. intermembrane space
24. Where does
A.
glycolysis
take
place?
Cytosol
B. Mitochondrial matrix
C. Mitochondrial inner membrane
D. Mitochondrial intermembrane space
25. Which of the
following
involves
directly in
the
O2 consumption during cellular respiration?
A. Glycolysis
B. The citric acid cycle
C. The oxidation of pyruvate to acetyl CoA
D. Accepting electrons at the end of the electron transport chain
[See next page
SBU3013
8
Biology I
following intermediary metabolite enters
(C02) from one molecule of pyruvate?
26. Which of the
of
a
carbon
the citric acid
cycle by the
removal
A. Lactate
B.
Acetyl
CoA
C. Oxaloacetate
D.
Glyceraldehydes-3-phosphate
27. Which location does
A.
acetyl CoA
accumulates
during
cellular
respiration?
cytosol
B. mitochondrial matrix
C. mitochondrial outer membrane
D. mitochondrial inner membrane
28.
aerobic
During
respiration, electrons travel
downhill in
_
A. glucose ---+ pyruvate ---+ ATP ---+ oxygen
B. food ---+ citric acid cycle ---+ ATP ---+ NAD+
C.
glucose
D. food
---+
---+
ATP
NADH
electron transport chain ---+ NADH
electron transport chain -e+ oxygen
---+
---+
29. One function of both alcohol fermentation and lactic acid fermentation is to
---
A. reduce NAD+ to NADH
B. reduce FAD+ to FADH2
C. oxidize NADH to NAD+
D. reduce FADH2 to FAD+
vigorously, the muscle cells becomes oxygen deprived, and
will convert pyruvate to lactate. What happen to the lactate in skeletal muscle cells?
30. When
an
individual exercise
A. It is converted to NAD+.
B. It is converted to alcohol.
C. It produces CO2 and water.
D. It is taken to the liver and converted back to pyruvate.
{See next page
",
SBU3013
9
Biology I
31. You have
a
friend who lost 7
kg
of fat
on a
"low carb" diet. How did the fat leave her
body?
A. It
was
B. It
was
CO2 and H20.
converted to ATP, which weighs much less than fat.
released
as
C. Chemical energy was converted to heat and then released.
D. It was broken down to amino acids and eliminated from the body.
32. Which of the
following
does not generate
genetic
variation within
a
population?
A.
Adaptation
B. Sexual reproduction
C. Genetic recombination
D. Independent assortment of alleles
33.
Single
base differences between individuals at
a
single
gene locus is called
_
A. heterozygosity
B. phenotypic diversity
C. balanced
D.
34.
single
polymorphisms
polymorphisms
nucleotide
Why do prokaryotes
genetic variation?
and
eukaryotes differ in their reliance
on
mutations for
generating
Prokaryotes are smaller in size than eukaryotes.
B. Prokaryotes sexually reproduce, eukaryotes do not.
C. Eukaryotes sexually reproduce, prokaryotes do not.
D. Eukaryotes possess a nucleus, prokaryotes do not.
A.
new population of field mice,
35. A group of field mice crosses a highway and joins a
an example of
producing offspring with this population. This is
_
A.
allopatric
B. gene flow
C. genetic drift
D. assortive
mating
[See
next page
."
')BU3013
10
Biology I
36. Charles Darwin is the first person to propose
A. that evolution
B.
a
occurs
mechanism for how evolution
C. that the earth is older than
D.
a
_
a
few thousand years
mechanism for evolution that
37. Natural selection is based
on
occurs
was
supported by
evidence
all of the following except
_
A. genetic variation exists within populations
B. individuals adapt to their environments and eventually evolve
C. the best-adapted individuals tend to leave the most offspring
D. individuals who survive
to leave
more
offspring
than those who die young
wings and dolphin flippers consist of bones which
these
developed from similar embryonic tissues. How do biologists interpret
38. Structures such
are
longer tend
as
human arms, bat
similarities?
I.
II.
III.
By identifying the bones as being homologous
By the principle of convergent evolution
By proposing that humans, bats, and dolphins share
a
common
ancestor
A. I and II
only
only
and III only
B. I and III
C. II
D. All the above
[See next page
SBU3013 Biology I
11
39. The
frequency of a particular allele of alpine plants decreases due to a landslide. As
result, only a small remnant of surviving plants bearing this allele. What had happen?
I.
A bottleneck
II.
Genetic drift
III.
A. I
the
Microevolution
only
B. I and II
only
only
C. II and III
D. All of the above
40.
Arrange the following
inclusive):
from most
I.
II.
general (Le.,
most
inclusive)
to most
specific (Le.,
least
Natural selection
Microevolution
III.
I ntrasexual selection
IV.
Evolution
V.
Sexual selection
A. IV, I, II, III, V
B. IV, II, I, III, V
C. IV, II, I, V, III
D. I, IV, II, V, III
[See next page
:BU3013
Biology
12
I
SECTION B
Instruction: Answer all
(40 marks)
questions.
1. Metabolic pathways are the sequences of enzyme-mediated reactions
rearrange, or break down substances.
a.
Compare
between anabolic and catabolic
by which
cells
build,
pathways.
[2 marks]
b.
Enzymes
would
on
are
their
catalysts
own.
that make chemical reactions
List two
(2)
occur
much faster than
they
classes of enzymes.
[2 marks]
[See next page
,BU3013
c.
13
Biology I
Figure 3
shows the
activity of three
enzymes
Figure
i. From Figure 3, which enzyme is most
likely
100
80
60
40
20
e
Z
Y
X
1
X, Y and Z.
3
isolated from
a
bacteria
living
in hot
spring?
[1 mark]
ii.
Enzyme
enzyme
X is isolated from human
X,
severe
fever may
cause
digestive system. Explain why in relation
to
death to human?
[2 marks]
iii. List
a
factor affects
activity
of enzyme other than temperature.
[1 mark]
[See next page
14
SBU3013 Biology I
d.
Figure
4
(a)
illustrates the conversion of succinate to fumarate catalyzed by enzyme
4 (b) shows malonic acid, which resembles chemical
dehydrogenase. Figure
structure of succinate inhibits the production of fumarate.
succinate
0.",
.....
0-
C,
CH
Ht,C"""O
-0-
Fumarate
__..
+
Enzyme
Enzyme
Succinate-enzyme complex
Succinate
Figure
4
(a)
No
product
is formed
Enzyme
Malonic acid
Malonate-enzyme complex
Figure 4 (b)
i. What is the role of malonic acid in Figure
4(b)?
[1 mark1
ii. You
run an
succinate dehydrogenase by
experiment with succinate, malonic acid and
placing all of these substances in the same
reduce the inhibitory effect of malonic acid.
beaker to react.
Suggest
one
method to
[1 mark]
[See
next page
;BU3013
2.
Photosynthesis
organisms.
a.
15
Biology I
is
an
ancient
Explain one (1) difference
in photosynthesis pathway.
pathway
between
which
highlights
light-dependent
and
the evolution
of
light-independent
autotrophic
reactions
[2 marks]
b.
State the stages of the Calvin
cycle reactions in the
correct sequence.
[2 marks]
[See next page
5BU3013
c.
Biology I
16
Figure 5 depicts
the day.
the difference of CO2
uptake
for two
plant species
P and
Q, throughout
CO2 uptake
Q
....
-_
'"
P
"
....
Midnight
6.00 AM
_-
......
_--_
Explain
cause
-�
6.00 PM
Noon
Figure
i.
...
5
(2) differences in the function of leaf structure
variation in CO2 uptake throughout the day.
two
the
Midnight
between
plant
P and Q that
[2 marks]
ii. Which
plant
is most
likely adapted
to desert habitat?
Justify
your
answer.
[2 mark]
[See next page
SBU3013 Biology I
17
iii. Based
on
Figure 5, what type
of carbon fixation
category for plant Q?
[1 mark]
iv. Give
an
example
of
plant Q.
[1 mark]
[See next page
,BU3013
3.
Biology
I
18
Cells convert the chemical energy of
chemical energy of ATP, which drives
a.
carbohydrates and other organic compounds into
nearly all life-sustaining reactions.
Write down thecorrect sequence of the
following
events in aerobic
the
respiration.
[1 mark1
Events
Sequence
Electron transport and chemiosmosis
Glycolysis
Formation of acetyl coA
Citric acid cycle
b.
Where does
glycolysis
occur?
[1 mark1
c.
Name and
explain
two
(2) major phases
in
glycolysis.
[4marks1
[See next page
SBU3013
d.
Biology I
19
A super enzyme is discovered in an
organism. The enzyme does not require ATP to
split glucose to pyruvate and cannot function in the presence of oxygen. This
organism's net ATP production from one molecule of glucose is four.
the
Explain
production
of these four ATP.
[2 marks]
e.
In bread
the
yeast needs
to be dissolved in
mixture of sugar, warm water and
flour. Within a short time, this mixture begins to bubble and foam. Explain what is
happening during this process?
making,
a
[2 marks]
[See next page
:BU3013
4.
Biology
Allele
a.
20
I
frequencies
State two
(2)
in
a
population
evidences
on
are
changing
over
the
generations.
evolution.
[2marks1
b. Compare the following concepts of evolution.
i.
Microevolution and macroevolution
[2 marks1
ii.
Mutation and natural selection
[2 marks1
[See next page
:BU3013
c.
Biology
I
21
Hardy Weinberg formula (p2 + 2pq + q2 1), can be used to count allele frequency for
specific trait. A population of bears may be brown (the dominant phenotype) or
white (the recessive phenotype). Brown bears have the genotype BB or Bb. White
bears have the genotype bb. Assuming the frequency of the BB genotype is 0.35. The
bear population is in Hardy Weinberg equilibrium.
=
a
i. Estimate the
frequency of heterozygous
bears.
[1 mark]
ii. Estimate the
frequency
of 8 allele.
[1 mark]
iii. Estimate the
frequency of b allele.
[1 mark]
iv. If
immigration of 20 new individual occurs
happen to the equilibrium of the population.
an
in the bear
population, predict
what
[1 mark]
END OF QUESTIONS