Mock
CE-Bio
CERTIFICATE BIOLOGY
NEW MASTERING BASIC CONCEPTS
BIOLOGY MOCK EXAM V
PAPER 2
(1 hour)
1
You should check that no questions are missed in this paper. Note
the words 'END OF PAPER' after the last question.
2
Answer ALL questions.
3
All questions carry equal marks.
4
You should put only ONE answer for each question. NO MARKS
will be given if you put more than one answer.
Certificate Biology New Mastering Basic Concepts
Mock Exam V Paper 2
 Oxford University Press 2006
There are 36 questions in Section A and 24 questions in Section B.
The diagrams in this paper are NOT necessarily drawn to scale.
Section A
[952201]
Directions: Questions 1 and 2 refer to the diagram below, which shows some plant cells under a
light microscope.
Diameter of the field = 450 µm
*1
If the total magnification of the microscope is 150x, what is the average length of each cell?
A
0.3 µm
B
0.6 µm
C
50 µm
D
90 µm
[952202]
*2
Given that the chloroplast count in the above field is 350. The density of chloroplast is
(Take  = 3.14)
A
12 µm-2.
B
25 µm-2.
C
37 µm-2.
D
50 µm-2.
[952203]
3
A student prepared a solution containing starch, oil and amylase. After 30 minutes, he
performed food tests on the solution. Which of the following does not give a positive
result?
A
Benedict's test
B
Albustix paper test
C
Iodine test
D
Spot test
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[952204]
Directions: Questions 4 and 5 refer to the diagram below, which shows a set-up used to
investigate the action of lipase on fat.
milk + lipase + pH indicator
4
Which of the following should be the control set-up?
A
B
fat-free milk +
milk +
lipase +
boiled lipase +
pH indicator
pH indicator
C
D
boiled milk +
water +
lipase +
lipase +
pH indicator
pH indicator
[952205]
*5
The results were recorded as follows:
Experimental set-up
Control set-up
6.5
6.5
4
6
Initial pH
pH after 15 minutes
What conclusion can be drawn from the above results?
A
The drop in pH in both set-ups was a result of bacterial growth.
B
Lipase is denatured by heat.
C
The active sites of lipase are reusable.
D
Lipase breaks down fats in milk into fatty acids and glycerol.
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[952206]
*6
Two animal species, X and Y, compete for the same food in the same habitat. Which of the
following graphs correctly shows their relationship?
A
B
C
D
[952207]
7
In the new policy of sustainable development, the government plans to use incineration
instead of landfill to treat the solid waste. Which of the following is not a potential
advantage?
A
Provide job opportunities in recycling industry.
B
Protect natural habitat.
C
Reserve land for residential use.
D
Reduce land pollution.
[952208]
8
Which of the following susbstances are likely to cause algal bloom when disposed of into
the sea?
(1)
toxic chemicals
(2)
residential sewage
(3)
inorganic fertilizers
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
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[952209]
9
What are the products of light reactions in photosynthesis?
A
Carbon dioxide and hydrogen
B
Glucose and oxygen
C
Oxygen and hydrogen
D
Water and oxygen
[952210]
*10
Which of the following reaction(s) take(s) place in human body when doing vigorous
exercise?
(1) glucose + oxygen  carbon dioxide + water
(2) glucose  carbon dioxide + lactic acid
(3) glucose  lactic acid
A
(1) only
B
(2) only
C
(1) and (2) only
D
(1) and (3) only
[952211]
Directions: Questions 11 and 12 refer to the following photograph of lotus.
X
11
What are the possible numbers of stomata in the upper and lower epidermis of leaf X?
Upper epidermis
Lower epidermis
A
12000
0
B
15000
1100
C
0
0
D
0
11500
[952212]
*12
Lotus can carry out vegetative propagation with its rhizome. Which of the following
statements about the seeds from a lotus plant is correct?
A
The seeds are haploids.
B
The seeds are genetically identical.
C
The seeds contain male and female gametes.
D
The seeds are produced by vegetative propagation.
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[952213]
13
The table below shows the nutrition fact of four food products:
Carbohydrates
(g)
Proteins
(g)
Fats
(g)
Calcium
(mg)
Dietary fibre
(µg)
Food P
18
35
16
191
15.5
Food Q
0
24
18
9
0
Food R
46
4
0.1
34
7.9
Food S
0.5
20
27
184
0
Which food product has the highest energy value per serving?
A
P
B
Q
C
R
D
S
[952214]
Directions: Questions 14 and 15 refer to the diagram below, which shows the longitudinal section
of a human villus.
X
14
What food substance is found inside X?
A
fatty acid
B
fat
C
glucose
D
starch
[952215]
*15
The food substance in X is first transported to the
A
liver.
B
muscle.
C
heart.
D
kidney.
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[952216]
16
After fasting for 24 hours, which of the following blood vessels cantains blood with the
highest blood glucose level?
head
lungs
R
P
S
liver
stomach
Q
kidneys
legs
A
B
C
D
P
Q
R
S
[952217]
*17
Under which of the following conditions will a person lose his body heat mainly by
evaporation?
A
B
C
D
Temperature (oC)
15
15
35
35
Relative humidity (%)
50
80
50
80
[952218]
*18
When a person is doing vigorous exercise, which of the following will happen?
(1) Heart beat rate increases.
(2) Arteries near skin surface dilate.
(3) Vital capacity increases.
A
(1) only
B
(1) and (2) only
C
(2) and (3) only
D
(1), (2) and (3)
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[952219]
Directions: Questions 19 and 20 refer to the graph below, which shows the change in blood
pressure in three parts of the heart.
Pressure
(mm Hg)
0.2
0.4
0.8
0.6
1.2
1.0
Time (s)
1.4
Key:
1.6
X
Y
Z
*19 Which of the following correctly states the parts represented by X, Y and Z?
X
Y
Z
A
aorta
auricle
ventricle
B
aorta
ventricle
auricle
C
ventricle
aorta
auricle
D
auricle
ventricle
aorta
[952220]
20
What is the heart rate in beat per minute?
A
38
B
60
C
75
D
100
[952221]
21
Blood normally does not contain
A
hormones.
B
fat.
C
carbon dioxide.
D
bile.
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[952222]
*22
The diagram below shows an air sac and a blood capillary.
inhaled air
X
Z
Y
direction of
blood flow
Which of the following correctly shows the relative concentration of oxygen in X, Y and
Z?
X
Y
Z
A
high
high
low
B
high
low
high
C
low
high
low
D
low
high
high
[952223]
23
What is the correct sequence of inhalation?
(1)
Intercostal muscles and diaphragm muscles contract.
(2)
Air rushes into the lung.
(3)
Pressure of the thoracic cavity decreases.
(4)
Lungs expand.
A
(1), (2), (3), (4)
B
(1), (3), (2), (4)
C
(1), (3), (4), (2)
D
(1), (4), (3), (2)
[952224]
24
The exhaled air from human body mainly consists of
A
carbon dioxide.
B
hydrogen.
C
nitrogen.
D
oxygen.
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[952225]
Directions: Questions 25 and 26 refer to the situation below.
A student sitting at the back of the classroom copies the notes on the blackboard down in the
notebook on his desk.
*25
What are the changes in the circular ciliary muscles and suspensory ligaments of the
student eyes?
Circular ciliary muscles
Suspensory ligaments
A
contract
tighten
B
contract
loosen
C
relax
tighten
D
relax
loosen
[952226]
26
Which of the following graphs shows the change in the curvature of lenses during the above
process?
A
B
C
D
[952227]
*27
The drop of blood pressure in capillaries is mainly due to
A
the small diameter of the capillaries.
B
the less elastic capillary wall.
C
the increase in cross-sectional area of the capillaries.
D
the formation of tissue fluid.
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[952228]
28
The diagram below shows a process involving two kinds of gametes in humans. Where
does this process occur?
cell A
cell B
A
B
C
D
ovary
oviduct
uterus
vagina
[952229]
Directions: Questions 29 and 30 refer to the diagram below, which shows the change in the
thickness of uterine lining of Susan in March.
*29 Susan has three children already and wants to prevent pregnancy using the rhythm
method. Within which period should Susan avoid sexual intercourse to prevent her
getting pregnant?
A
3rd to 9th March
B
11th to 17th March
C
19th to 25th March
D
27th to 31st March
[952230]
*30
As the rhythm method is not very reliable, Susan considers to use surgical method. Which
of the following about Susan is correct if her oviducts are cut and tied.
Ovulation
Menstruation
A
occurs
occurs
B
occurs
does not occur
C
does not occur
occurs
D
does not occur
does not occur
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[952231]
*31
The diagram below shows a man climbing on a rocky cliff.
muscle R
muscle P
muscle Q
muscle S
What are the conditions of his leg muscles in this posture?
P
Q
R
S
A
contracts
relaxes
contracts
relaxes
B
contracts
relaxes
relaxes
contracts
C
relaxes
contracts
relaxes
contracts
D
relaxes
contracts
contracts
relaxes
[952232]
*32
The key below can be used to identify four types of pathogens.
1a
with true nucleus……….
2
1b
without true nucleus……
3
2a
with cell wall…………...
P
2b
without cell wall………..
Q
3a
with cytoplasm…………
R
3b
without cytoplasm……...
S
Which of the following correctly identifies pathogens Q and R?
Q
R
A
fungi
prokaryotes
B
fungi
viruses
C
protoctists
prokaryotes
D
protoctists
viruses
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[952233]
33
Under which circumstance(s) may identical twins be formed?
(1) one ovum fertilized by one sperm
(2) one ovum fertilized by two sperm
(3) two ova fertilized by two sperm
A
(1) only
B
(2) only
C
(1) and (2) only
D
(2) and (3) only
[952234]
Directions: Questions 34 and 35 refer to the diagram below, which shows a human skeleton.
X
A
C
D
E
34
B
Which of the following statements is correct?
A
Bone E is a part of the axial skeleton.
B
Joint X is a hinge joint.
C
Cartilage is present between bones C and D.
D
Bones A and B are held together with tendons to prevent dislocation.
[952235]
35
Which of the following is not a function of bone C?
A
It supports the body weight.
B
It protects the central nervous system.
C
It stores iron.
D
It provides surface for muscle attachment.
[952236]
36
Organisms of the same species
A
have identical genetic materials.
B
contain the same number of chromosome pairs.
C
have the same phenotype.
D
can interbreed to produce fertile offspring.
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Section B
[952237]
Directions: Questions 37 and 38 refer to the diagram below, which shows a nitrogen cycle.
nitrogen gas in
process 3
process 1
atmosphere
plant proteins
nitrate in
process 2
Y in soil
soil
X
*37
What are substances X and Y?
X
Y
A
animal proteins
ammounium compounds
B
nitrite ions
ammounium compounds
C
animal proteins
nitrite ions
D
nitrite ions
urea
[952238]
38
What are processes 1 and 3?
process 1
process 3
A
denitrification
nitrification
B
nitrification
decomposition
C
nitrogen-fixation
denitrification
D
decomposition
nitrogen-fixation
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[952239]
Directions: Questions 39 and 40 refer to the diagram below, which shows a set-up used to
measure the rate of transpiration of a leafy plant.
air bubble
330.00 g
The results are recorded in the table below:
Position of air bubble (cm)
Weight of the set-up (g)
Time = 0
Time = 30 minutes
4
16
330.00
329.1
Given that the cross-sectional area of the graduated tube is 0.1 cm2.
*39
What is the rate of transpiration of the plant?
A
0.04 cm3 min-1
B
0.4 cm3 min-1
C
0.03 g min-1
D
0.3 g min-1
[952240]
**40 How much water is retained by the plant in 30 minutes?
A
0.3 g
B
0.6 g
C
0.9 g
D
1.2 g
[952241]
41
Which of the following statements about tissue fluid is incorrect?
A
At the arteriole end, tissue fluid is formed due to the high blood pressure.
B
At the venous end, some tissue fluid returns to the blood stream by osmosis.
C
Some tissue fluid is absorbed into the lymph vessels.
D
Tissue fluid does not contains blood cells.
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[952242]
*42
Three tubes were set up as below and left for 15 minutes. The solutions were then tested
with Albustix paper.
saliva
+
protein solution

gastric juice
+
protein solution

intestinal juice
+
protein solution

Tube (1)
Tube (2)
Tube (3)
Which tube(s) will give positive result?
A
(1) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
[952243]
43
A boy smells some food and his saliva secretion increases. This reflex action follows the
pathway below:
stimulus  receptor  coordinating centre  effector  response
Which of the following are involved in the coordinating centre?
(1)
brain
(2)
spinal cord
(3)
neurone
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
[952244]
*44
Which of the following statements about insulin is incorrect?
A
Muscle is the site of action of insulin.
B
Insulin catalyzes the conversion of glucose into glycogen.
C
Insulin is a protein.
D
Insulin is carried around the body by blood.
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[952245]
45
The graph below shows the effect of environmental temperature on the body temperature of
organisms I and II.
Which of the following is a correct match for organisms I and II?
I
II
A
lizard
shark
B
human
frog
C
snake
whale
D
bird
bat
[952246]
Directions: Questions 46 and 47 refer to the diagram below, which shows the vertical section of a
heart.
4
1
2
5
3
X
46
Y
Which blood vessel carries oxygenated blood towards the heart?
A
1
B
2
C
4
D
5
Certificate Biology New Mastering Basic Concepts
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[952247]
*47
When chamber X contracts, which of the following valves is/are closed?
(1)
semi-lunar valves
(2)
bicuspid valve
(3)
tricuspid valve
A
(1) only
B
(2) only
C
(3) only
D
(2) and (3) only
[952248]
Directions: Questions 48 and 49 refer to the diagram below, which shows the structure of the
nephron in humans.
Z
X
Y
*48
In which region is the concentration of urea the highest?
A
X
B
Y
C
Z
D
The concentration of urea remains unchanged.
[952249]
49
Which of the following about the substances found at the three regions is correct?
Substance
X
Y
Z
A
proteins
present
absent
absent
B
glucose
present
present
present
C
urea
present
present
absent
D
salts
present
present
present
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[952250]
Directions: Questions 50 and 51 refer to the diagram below, which shows some fossils found
in different layers of a rock.
organism A
Rock
layer 1
layer 2
organism B
layer 3
organism C
*50
What can you know from the above fossils?
(1)
Organisms A, B and C are all extinct.
(2)
Organisms A and B have evolved from organism C.
(3)
Organism C is the earliest fossils formed.
A
(2) only
B
(3) only
C
(1) and (3) only
D
(2) and (3) only
[952251]
51
Scientists found that organism B is a close relative of snails. Which of the following is the
most convincing evidence?
A
Both organism B and snails have hard shells.
B
The DNA fingerprints of organism B and snails are very similar.
C
Both organism B and snails are invertebrates.
D
The habitat and diet of organism B are similar to that of snails.
[952252]
52
Misuse of antibiotics will result in drug-resistant bacteria because
A
the effectiveness of the antibiotics dropped with time.
B
there are genetic variations among the bacteria population.
C
the stronger bacteria are allowed to survive and reproduce.
D
the bacteria have got used to the antibiotics.
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[952253]
53
Which of the following shoots will grow towards the light?
mica plate
auxin agar block
light
dark
chamber
(1)
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
(2)
(3)
[952254]
*54
The diagram below shows a stage in cell division.
Which of the following is correct?
Type of cell division
Number of chromosomes in each daughter cell
A
meiotic cell division
2
B
meiotic cell division
2 pairs
C
mitotic cell division
2 pairs
D
mitotic cell division
4 pairs
[952255]
55
People with long sight cannot see near objects clearly because
A
their eyeballs are too long.
B
the images cannot be transmitted to the brain.
C
the images are formed on the blind spot.
D
no sharp image can be formed on the retina.
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[952256]
56
Which of the following is the correct sequence of genetic engineering?
(1)
A desired gene is cut out from an organism.
(2)
Copies of the desired gene are made.
(3)
The desired gene is inserted into a vector.
(4)
The vector is introduced into a host cell.
A
(1), (3), (4), (2)
B
(2), (1), (3), (4)
C
(1), (4), (3), (2)
D
(4), (3), (2), (1)
[952257]
Directions: Questions 57 and 58 refer to the diagram below, which shows the blood smear of
humans.
P
R
S
Q
57
Which of the following statements about S is incorrect?
A
It is present in tissue fluid.
B
It is irregular in shape.
C
It can engulf and digest pathogens.
D
It can produce antibodies.
[952258]
58
Which of the following will decrease in number if the body lacks iron?
A
P only
B
Q only
C
P and Q only
D
Q and R only
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[952259]
*59
The diagram below shows a flower. Which of the following statements are incorrect if the
pollen grains in Y are transferred to X?
X
Y
(1)
All the seeds formed from this flower are genetically the same.
(2)
This transfer process is called sexual reproduction.
(3)
The pollen grains will travel down X to fuse with the female gametes.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
[952260]
60
Colour blindness is caused by a recessive allele located on the X chromosome. This disease
is more popular in
A
females, because females have two X chromosome.
B
females, because females are likely to be the carriers of this recessive allele.
C
males, because males have one X chromosome only.
D
males, because males are likely to be the carriers of this recessive allele.
END OF PAPER
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Biology Mock Exam V Paper 2
Question No.
Answer
Question No.
Answer
1.
2.
3.
4.
5.
B
D
C
B
D
31.
32.
33.
34.
35.
C
C
A
C
C
6.
7.
8.
9.
10.
C
A
C
C
D
36.
37.
38.
39.
40.
D
A
C
A
A
11.
12.
13.
14.
15.
A
C
A
B
C
41.
42.
43.
44.
45.
D
D
B
B
C
16.
17.
18.
19.
20.
A
C
A
B
C
46.
47.
48.
49.
50.
D
D
B
D
B
21.
22.
23.
24.
25.
D
D
C
C
B
51.
52.
53.
54.
55.
B
C
B
A
D
26.
27.
28.
29.
30.
A
C
B
B
A
56.
57.
58.
59.
60.
A
D
A
D
C
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