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1
What is a difference between plant and animal cells?
A
Animal cells burst when they take in excess water by osmosis whereas plant
cells do not.
2
B
Plant cells store cellulose whereas animal cells store starch.
C
Animal cells have ribosomes whereas plant cells do not.
D
Plant cells have a cell wall whereas animal cells have a cell membrane
The diagram below shows a plant cell which has been left for a long period in a
concentrated sucrose solution.
Which line in the table below describes correctly the condition of the cell and the
contents of the area labelled X?
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3
4
In cells, anaerobic respiration occurs in the
A
cell cytoplasm
B
cytochrome system
C
matrix of mitochondria
D
cristae of mitochondria.
The following investigation into the removal of stains by washing powders.
Six beakers were set up as shown below.
Beakers 1 and 2 can be compared to investigate the effect of
5
A
temperature
B
type of cloth
C
type of stain
D
type of washing powder.
Both washing powder and body cleanser are cleaning products. However, their
compositions are different, in which lipase is often added into the
washing powder but not into the body cleanser. This is because lipase
A
is not so effective to help the removal of dirt on the body
B
can work best when mixed with other enzymes in the washing powder
C
may cause damage on the skin
D
is denatured in a hot bath
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7
Which solutions are used for testing for protein, reducing sugar and starch?
Test for protein
Test for reducing sugar
Test for starch
A
Benedict’s
Iodine
Biuret
B
Biuret
Benedict’s
Iodine
C
Biuret
Iodine
Benedict’s
D
Iodine
Biuret
Benedict’s
Which of the following food substances is/are absorbed directly without digestion ?
(1) vitamin C
(2) sucrose
(3) polypeptide
8
A
(1) only
B
(2) only
C
(1) and (3) only
D
(2) and (3) only
Which line in the table below correctly shows the parts of a plant for which nitrogen,
phosphorus and potassium are important for growth?
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9
In an experiment to compare water loss, four similar leaves are treated with
petroleum jelly (Vaseline) and left on a table for one hour.
leaf 1 upper surface only covered
leaf 2 lower surface only covered
leaf 3 both surfaces covered
leaf 4 neither surface covered
Which shows the water loss from the leaves?
Water loss
Most
10
least
A
1
4
3
2
B
1
2
4
3
C
4
3
1
2
D
4
1
2
3
Defence mechanisms that plants have against insects include the ...
A
cell walls of cellulose.
B
production of toxic chemicals.
C
presence of an internal vascular system.
D
ability of stomata to close both day and night
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11
The diagram below shows a cross-section of the heart.
Which of the following statements describes the movement of the valves during
ventricular systole?
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A
Valves P and Q open and valves R and S close
B
Valves P and R open and valves Q and S close
C
Valves P and Q close and valves R and S open
D
Valves P and R close and valves Q and S open
Which of the following diagrams shows the movement of carbon dioxide (CO2),
oxygen (O2) and nutrients between a capillary and muscle tissue?
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The diagram shows a capillary and some body cells.
How do ions pass from P to Q?
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A
by diffusion in blood
B
by diffusion in tissue fluid
C
by osmosis in blood
D
by osmosis in tissue fluid
Which line in the table below shows the effect of regular exercise on resting pulse rate
and recovery time?
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15
The following diagram shows the change in lactic acid concentration in the blood of a
person when he performed vigorous exercise :
Concentration of
lactic acid in
blood ( mg per
100 cm3 blood)
Time / minutes
Which of the following lead to the change in lactic acid concentration in the
blood during the 10th to 20th minute ?
(1) an increase in the breakdown of glucose
(2) a reduction in oxygen supply to the muscles
(3) an increase in energy demand of the muscles
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
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Which response summarizes meiosis?
Paring of
Number of divisions
Results
chromosomes
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A
No
One
Two diploid cells
B
No
Two
Four diploid cells
C
Yes
One
Two haploid cells
D
Yes
Two
Four haploid cells
The scientists removed the pancreas of a healthy dog, and it shows signs of diabetes.
When they injected extracts of pancreas into the same dog, the signs of diabetes
disappeared. What conclusion can be drawn from the above treatments?
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A
A lack of the pancreatic extracts would lead to diabetes.
B
The secretion of the pancreas can reduce blood glucose level.
C
Insulin can convert glucose into glycogen in the liver and muscles.
D
Pancreas can detect the blood glucose level and regulate it.
Damage to the dendrites of a motor neuron in a reflex arc would probably prevent …
A
a receptor from receiving a stimulus.
B
synaptic contact with a sensory neuron.
C
an impulse from being transmitted to an effector organ.
D
an impulse from being transmitted to the spinal cord.
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Which line in the table below correctly shows the effect of alcohol on reaction time
and muscle control?
20
The diagrams below show the human eye under different conditions.
Which TWO diagrams above show the result when the ciliary muscles contract and the
circular muscles of the iris relax?
A
1 and 3
B
3 and 2
C
1 and 4
D
4 and 2
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students (P, Q, R and S) are asked to compare and explain the average body
temperatures of people living in Hong Kong and South Pole. Below are their responses:
P: The two body temperatures are very similar because both two groups need a suitable
body temperature to facilitate enzymatic reactions in the body.
Q: The two body temperatures are very similar because human are homoeothermic.
R: The two body temperatures should differ for at least 5°C because the two regions
have different climates.
S: The two body temperatures should differ for at least 5°C because the people in two
regions have different clothing.
Which of the students points out the correct comparison and cause?
A
P
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B
Q
C
R
D
S
One advantage of growing cuttings in a mist propagator is that this reduces
A
water loss
B
root growth
C
humidity
D
leaf surface area.
Heating milk to remove some of the liquid makes it more concentrated.
The type of milk produced by this treatment is
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A
evaporated
B
skimmed
C
semi-skimmed
D
UHT.
Why have some bacteria become resistant to antibiotics?
A
The range of antibiotics has increased.
B
Antibiotics have been over-used.
C
Antibiotics can only be produced by fungi.
D
Doctors are prescribing fewer antibiotics.
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The fermenter below is used in the manufacture of antibiotics.
The volume of this fermenter is 700 litres.
The fermenter produces 5 g of antibiotic per litre every day.
The total number of grammes of antibiotic produced in one week in the fermenter is
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A
700
B
3 500
C
4 900
D
24 500.
Which ONE of the following statements is TRUE about the relationship between a
predator and its prey?
A
There is interspecific competition.
B
The size of the predator population is regulated by the size of the prey
population.
C
An increased number of predators leads to an increased number of prey.
D
A decreased number of predators leads to a decreased number of prey.
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The graph below shows the changes in oxygen concentration before and after waste
whey is released into a river.
At which sample point in the river would the range of living organisms, other than
bacteria, be greatest?
28
Modern technology has resulted in the production and use of insecticides.
Which statement is a false description of insecticides?
A
Insecticides can affect food chains.
B
Insecticides can cause pollution.
C
Insecticides improve yields.
D
Insecticides target weeds.
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29 What are the main undesirable effects of sulphur dioxide pollution released by factories,
overuse of fertilisers and nuclear fall out?
Sulphur dioxide pollution
Overuse of fertilizers
Nuclear fall out
A
Acid rain
Genetic mutations
Eutrophication
B
Acid rain
Eutrophication
Genetic mutations
C
Genetic mutations
Eutrophication
Acid rain
D
Eutrophication
Acid rain
Genetic mutation
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The diagram shows a cross section of a leaf.
In which two parts of the leaf does photosynthesis take place?
A
1 and 3
B
2 and 3
C
3 and 4
D
4 and 5
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31
The use of fossil record to study evolution involves
(1) creativity
(2) evidence-based interpretation
(3) experimentation
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A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
Changes in the ovary during the menstrual cycle are described below.
1 Corpus luteum forms.
2 Ovulation occurs.
3 Progesterone is produced.
4 Corpus luteum degenerates.
5 Follicle develops.
The sequence in which these changes occur following menstruation is
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34
A
2, 3, 1, 5, 4
B
2, 1, 3, 4, 5
C
5, 2, 1, 3, 4
D
5, 3, 2, 1, 4.
Menstruation starts when the production of ...
A
progesterone is at its maximum.
B
oestrogen is at its maximum.
C
oestrogen and progesterone decreases.
D
luteinising hormone is at its maximum.
Which ONE of the following statements about identical twins is
CORRECT?
A
They have different sets of genes.
B
They are formed from a single fertilised ovum that splits into two cells.
C
They may be of different sexes.
D
They are formed from two separate ova.
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Some pollen grains of a mango tree are transferred to the stigma of another
mango tree. Which of the following statements about the pollen grains of the
mango tree is/are correct ?
(1) They are the male gametes.
(2) They help in the dispersal of mango plants.
(3) They help to transfer genetic materials from one mango tree to another.
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A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
In an experiment to investigate the effects of various environmental factors on
germination, four boiling tubes were set up as shown.
In which tube would the seeds germinate most quickly?
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Gene flow is best defined as ...
A
the transmission of genetic information from the cytoplasm to the nucleus.
B
the transmission of alleles from parents to their offspring.
C
the spread of alleles through a population over a period of successive
generations.
D
the movement of genes from one chromosome to another.
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39
40
Two parents both have blood group A. Their child has blood group O. What is the best
explanation for this pattern of inheritance?
A
The child has inherited the blood group directly from a grandparent.
B
The parents are homozygous for the blood group alleles.
C
The parents are heterozygous for the blood group alleles.
D
There has been a mutation in the blood group alleles.
Which ONE of the following is an example of artificial selection?
A
DDT resistance in mosquitoes
B
The development of different species of tortoise from a common ancestor
C
The decreasing effect of antibiotics on bacteria
D
Breeding dairy cattle to increase milk production
Which of the following statements are characteristic of DNA?
(i) Double-stranded helix
(ii) Sugar molecule is ribose
(iii) Found in the nucleus
(iv) Constant amount normally found in all the somatic cells of a particular species
A
(i), (ii) and (iii) only
B
(i), (ii) and (iv) only
C
(i), (iii) and (iv) only
D
(i), (ii), (iii) and (iv)
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13.
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What causes the genetic disorder where some males have the sex chromosomes XXY?
A sex-linked recessive allele
Non-disjunction of chromosomes during meiosis
Two sperm cells fertilise one ovum
Crossing-over during meiosis
Two parents both have blood group A. Their child has blood group O. What is the best
explanation for this pattern of inheritance?
The child has inherited the blood group directly from a grandparent.
The parents are homozygous for the blood group alleles.
The parents are heterozygous for the blood group alleles.
There has been a mutation in the blood group alleles.
A learner conducted an investigation to determine the percentage of people that are longsighted.
The factor that is LEAST likely to affect such an investigation is the ...
light intensity of the room in which the test was conducted.
height of the people.
age of the people in the sample.
distance between the tool used to test the sight and the person being tested.
Which ONE of the statements below relates to biological evolution?
Artificial selection is essential for the evolution of species
Humans have now progressed from a technological age into
an information age
Modern species evolved from ancestral species
Genetic mutations generally cause species to die
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Which part below forms part of the placenta
Amnion
Chorion
Fallopian tube
Cervix
If fertilisation was to occur, the level of hormone Z from day 18 would ...
The following diagram shows the carbon dioxide absorbed and released during a
day by a plant:
When does the plant have a net gain of dry mass during the day?
A. at 1300 only B. 0700 – 1800
C. 0800 – 1700 D. 1800 – 0700
Membrane proteins are necessary for many nerve functions. Which process in
nerves does not require a membrane protein?
A. Diffusion of neurotransmitter
B. Binding of neurotransmitter
C. Active transport of sodium ions
D. Propagation of a nerve impulse
In an experiment to investigate the effect of temperature on the activity of a digestive enzyme X,
the time taken for the digestion of a fixed amount of substrate by this enzyme was recorded.
Which of the following graphs shows the most likely results of the experiment?
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The table below shows the ratios of initial mass to final mass of three fresh potato cylinders
which have been immersed in sucrose solutions of three different concentrations for 30 minutes:
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