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JUNYUAN SECONDARY SCHOOL
Secondary Four Express
Preliminary Examination 2012
CANDIDATE
NAME
CLASS
INDEX
NUMBER
BIOLOGY
5094/01
13 September 2012
Paper 1 Multiple Choice
0800-0900
1 hour
Additional Materials: Multiple Choice Answer Sheet
READ THESE INSTRUCTIONS FIRST
Write in soft pencil.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been
done for you.
There are forty questions on this paper. Answer all questions. For each question there are four possible
answers A, B, C and D.
Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.
Read the instructions on the Answer Sheet very carefully.
Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
Any rough working should be done in this booklet.
This document consists of 14 printed pages.
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2
1
The diagram shows the magnified structure of an animal cell under an electron microscope.
4
1
2
3
What are the functions of the labeled structures?
A
B
C
D
2
synthesizing
protein from amino
acids
2
1
1
2
transporting
proteins
processing
proteins
secreting digestive
enzymes
3
3
4
1
4
2
2
4
1
4
3
3
The diagram shows three processes by which molecules move in living organisms.
Which of the following identifies the processes correctly?
A
B
C
D
diffusion
process 2
process 2
process 1
process 1
© Junyuan Secondary School 2012
osmosis
process 1
process 3
process 2
process 3
active transport
process 3
process 1
process 3
process 2
5094/01/Prelim/2012
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3
3
The following describes five processes occurring in plants or mammals.
I
II
III
IV
V
carbon dioxide entering a leaf
water moving from soil into roots
transport of glucose across the villi
absorption of nitrate ions into root hair cells
movement of oxygen from alveolar space into blood capillaries
Which of the above involves active transport?
A
B
4
III and IV
II and IV
I, II and III
III, IV and V
In an experiment, 15.0 g of boiled egg white was mixed with protease solution. After 1 hour
at 15 °C, 5.0 g of protein was digested. The experiment was repeated at 25 °C and again at
60 °C.
How much protein was broken down in the second and third experiments?
A
B
5
C
D
5.0 g and 0.0 g respectively
5.0 g and 7.0 g respectively
C
D
7.0 g and 0.0 g respectively
7.0 g and 10.0 g respectively
Five disaccharides were each hydrolysed with dilute acid and the purified products were
separated by chromatography. The results are shown in the diagram below.
1
2
3
4
5
Spot 1 in the diagram represents the products obtained from the hydrolysis of sucrose.
Which of the following represents the results obtained from the hydrolysis of lactose and
maltose?
A
B
C
D
6
lactose
2
2
5
5
maltose
3
4
2
3
Milk produces a brick red precipitate when heated with Benedict’s solution.
A purple colour develops when the Biuret test is used.
Using only these results, which nutrients does milk contain?
A
B
fat and protein
fat and starch
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C
D
5094/01/Prelim/2012
reducing sugar and protein
reducing sugar and starch
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4
7
Which of the following abdominal organs has both endocrine and exocrine functions?
A
B
C
D
8
The following figure shows a transverse section of an intestinal villus.
X
The main food substance that is absorbed by structure X is
A
B
9
amino acids.
fat globules.
C
D
fatty acids.
glucose.
In an experiment where light intensity is constantly high, under which of the following
conditions will carbon dioxide be the main limiting factor for photosynthesis?
A
B
C
D
temperature / °C
8
16
22
28
© Junyuan Secondary School 2012
carbon dioxide / %
0.02
0.04
0.04
4.00
5094/01/Prelim/2012
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5
10
A leafy shoot is placed in a sealed transparent container with some
hydrogencarbonate indicator solution which changes colour as shown in the following
diagram.
leaf
hydrogencarbonate
indicator
Which colour will the hydrogencarbonate indicator be at midday and at midnight?
A
B
C
D
11
at midday
purple
red
yellow
yellow
at midnight
yellow
purple
purple
red
The table below shows the stomata distribution in four leaves.
leaf
1
2
3
4
stomata density (no./mm2)
upper surface
lower surface
30
200
100
100
200
0
0
0
Which is the most possible reason for the absence of any stoma on the lower surface of
leaf 3?
A
B
C
D
12
The leaf floats on the surface of water.
The lower surface is exposed to direct sunlight.
The plant grows in a forest with a high humidity.
The plant has an abundant water supply.
Which conditions result in the lowest reading when using a potometer?
A
B
dry and cold
dry and warm
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C
D
5094/01/Prelim/2012
wet and cold
wet and warm
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6
13
A plant was placed in the setup shown in Fig. A and the rate of fall of the water
in the measuring cylinder was noted over a period of time. A similar plant was set up in the
same way but, soon after the start of the experiment, a fan was directed at the plant. The
graphs in Fig. B show the rate of fall of the water levels in both cases.
plant
split cork
measuring
cylinder
Fig. B
Fig. A
Which statement is the best explanation of the difference between the two graphs?
A
B
C
D
14
The fan caused an increase in the rate of translocation, resulting in increased water
uptake.
The fan caused evaporation of water from the cylinder.
The fall caused more water to be lost by transpiration.
The plant took up less water as the fan cooled the temperature.
Four days after a man has ascended to a mountain of 6000 metres high, the density of his
red blood cells increases compared with the initial density measured at sea level. Which of
the following explanations is correct?
A
B
C
D
The atmospheric pressure at high altitudes is so high that it increases the solubility
of oxygen in blood.
The body has adapted by producing more red blood cells to compensate for a lower
level of oxygen as high altitudes.
The air at high altitude is thicker than those at sea level.
The percentage of oxygen in air at high altitude is higher than those at sea
level.
© Junyuan Secondary School 2012
5094/01/Prelim/2012
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7
15
The diagram below shows the change in blood pressure along three types of blood vessels
M, N and O found in muscles.
blood
pressure
M
N
O
blood vessels
Why does the blood pressure in vessel O fluctuate?
A
B
C
D
16
Blood pressure in O changes as its wall contracts and relaxes.
It indicates that the person has heart disease.
The vessel is blocked by fatty deposits.
Valves in O slow down the flow of blood.
The following table shows the results of a blood test between 3 students X, Y and Z for
blood transfusion.
recipient
X
+
+
-
X
Y
Z
donor
Y
+
-
Z
+
+
+
key:
+ blood can be transfused
- blood cannot be transfused
What could the blood groups of Y and Z be?
A
B
C
D
17
Y
AB
O
A
O
Z
O
AB
B
A
The table shows the percentage composition of four samples of air.
Which sample could have been breathed out by a person with emphysema?
A
B
C
D
oxygen
14
16
18
21
© Junyuan Secondary School 2012
carbon dioxide
4
0.04
4
0.04
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water vapour
saturated
unsaturated
saturated
unsaturated
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8
18
What happens during anaerobic respiration in muscles?
A
B
C
D
19
carbon dioxide produced
no
no
yes
yes
oxygen used
no
yes
no
yes
water produced
no
yes
yes
no
Vigorous bubbling was observed in a cloudy suspension of yeast and glucose solution.
However, the suspension became clear and bubbling stopped after 2 days.
Which of the following are possible reasons?
20
I
II
III
IV
Alcohol concentrations became too high and killed the yeast.
Glucose was not a suitable substrate for the yeast.
Glucose was used up.
Yeast settled down to the bottom of the flask.
A
B
I, II and III only
I, III and IV only
I, II and IV only
II, III and IV only
Which of the following does not produce carbon dioxide?
A
B
21
C
D
a muscle fibre
a sensory neurone
C
D
blood
saliva
The figure below shows a vertical section of human skin.
I
IV
V
II
III
Which of the following correctly matches each part to its function?
A
B
C
D
insulation
I
III
I
III
© Junyuan Secondary School 2012
defence
III
I
V
II
excretion
IV
II
II
IV
5094/01/Prelim/2012
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9
22
The diagram shows a single nephron from the
kidney.
Where does antidiuretic hormone (ADH) affect the
permeability of membranes to water?
A
B
C
D
23
1
2 and 3
2 and 4
4 and 5
5 and 6
2
5
4
3
The diagram below shows what happens in the eyes of a girl when she looks at a distant
object.
X
Y
lens
Which of the following correctly describes the state of X, Y and the lens?
A
B
C
D
24
X
contracted
relaxed
taut
slackened
Y
relaxed
taut
relaxed
contracted
lens
more curved
less curved
less curved
more curved
The circles represent the diameter of the blood vessels in the surface of the skin as the
body temperature changes.
Which shows the diameter of the blood vessels during exercise and during a cold shower?
diameter of blood vessels
during
during cold
exercise
shower
A
B
C
D
© Junyuan Secondary School 2012
5094/01/Prelim/2012
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6
10
25
Four processes that take place in the human body are listed.
I
II
III
IV
absorption of amino acids through the villi
maintenances of a constant body temperature
production of lactic acid in muscles
regulation of blood glucose concentration
Which two processes are directly controlled by negative feedback?
A
B
26
I and III
I and IV
A
B
1, 3 and 6
2, 3 and 6
2
3
4
C
D
5
6
1, 4 and 5
2, 4 and 5
Which of the following is not a way of avoiding HIV infection?
A
B
C
D
28
II and III
II and IV
The petals, stigma and stamens are obtained from two different flowers. Which of the
following parts are obtained from a wind-pollinated flower?
1
27
C
D
being vaccinated against the HIV
using condoms during sexual intercourse
using disposable needles for injections
screening all blood donors for AIDS
The diagram below shows the changes in the thickness of the endometrium during a typical
28-day menstrual cycle.
Which of the following statements best describes the hormones at work on day 14?
A
B
C
D
concentration of oestrogen is higher than progesterone
concentration of progesterone is higher than oestrogen
only oestrogen is present to thicken the endometrium
only progesterone is present to maintain the endometrium
© Junyuan Secondary School 2012
5094/01/Prelim/2012
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11
29
The family tree shows the inheritance of a condition caused by the recessive allele t.
1
2
3
4
normal female
affected female
key
5
6
7
8
9
10
normal male
11
affected male
12
13
14
15
Which of the females are certain to have a heterozygous genotype?
A
B
30
1, 6 and 7
1, 7 and 12
C
D
7, 9 and 15
9, 12 and 15
The diagram shows the chromosomal karyotype of a
cell obtained from an individual.
The following deductions were made.
I
II
III
The individual is a female.
The individual has a genetic disorder.
The individual has blood type AB.
Which of the deductions were accurate?
A
B
C
D
31
I and II only
I and III only
II and III only
I, II and III
The diagram shows the maternal and paternal chromosomes from a muscle cell.
key
maternal
paternal
If the cell divides by meiosis, which diagram shows a possible viable gamete?
A
© Junyuan Secondary School 2012
B
C
5094/01/Prelim/2012
D
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12
32
A pregnant woman is told by a genetic counselor that her baby has equal chances of being
either blood group A or blood group AB.
What are the possible genotypes of the woman and her husband?
A
B
33
AA and BO
AB and BO
C
D
AO and BB
AB and AO
The diagram shows part of the central nervous system where X, Y and Z indicate possible
positions to apply an anesthetic block.
A person’s hand is pricked by a pin.
Which of the following correctly describes the effects when an anesthetic block is applied at
X and Y respectively?
X
A
B
C
D
34
35
pain felt




Y
arm moved




pain felt




arm moved




key:


true
not true
Which of the following are genetically identical?
I
II
III
IV
brothers and sisters from the same parents
seedless fruits from the same plant
seeds in the same fruit
white blood cells from the same person
A
B
I and II
I and IV
C
D
II and III
II and IV
In a DNA molecule, how many codons are required to code for a polypeptide containing
300 amino acids?
A
B
100 codons
150 codons
© Junyuan Secondary School 2012
C
D
5094/01/Prelim/2012
300 codons
900 codons
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13
36
The diagram below shows the relationship between DNA, genes and chromosomes.
Identify the structures labeled P, Q and R.
P
gene
chromosome
DNA
chromosome
A
B
C
D
37
38
R
chromosome
gene
chromosome
DNA
Where does genetic variation occur in the production of offspring?
I
II
III
IV
prophase I of meiosis
metaphase I of meiosis
prophase II of meiosis
fertilization
A
B
I, II and IV
I, III and IV
C
D
II and III only
II and IV only
Some types of bacteria make carbohydrates from chemicals found near very hot
underwater volcano habitats. What are these bacteria?
A
B
39
Q
DNA
DNA
gene
gene
anaerobic
consumers
C
D
decomposers
producers
Which resources are constantly recycled to maintain life?
A
B
C
D
carbon




© Junyuan Secondary School 2012
oxygen




energy




5094/01/Prelim/2012
key:


recycled
not recycled
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14
40
The diagram shows part of a food web.
Which is a pyramid of numbers based on this food web?
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5094/01/Prelim/2012
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15
Suggested Answers
1-5
21-25
DDACA
BDCCD
6-10
26-30
© Junyuan Secondary School 2012
CCCCA
DAACA
11-15
31-35
5094/01/Prelim/2012
ACCBA
CAADC
16-20
36-40
ACABD
BADBA
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