NAME: ……………………………………………………………………………………………

ST AUGUSTINE INTERNATIONAL SCHOOL

YEAR 10

BIOLOGY 0610/2
Time allowed: 45 minutes

Answer all questions

1. Which process is carried out by all organisms?

A. growth
B. photosynthesis
C. sexual reproduction
D. transpiration
2. What is the first part of the scientific name of an organism, using the binomial system?
A. genus
B. group
C. kingdom
D. species
3. The diagram shows a plant cell. In which labelled part of the cell is glucose made?

4. The diagram shows an epidermal cell from an onion plant. The distance between X and Y on
the diagram is 60 mm. The actual length of the cell between X and Y is 150 μm.

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 What is the magnification of the cell?
A. ×40
B. ×250
C. ×400
D. ×2500
5. Some plant cells are placed in distilled water for 1 hour. Which description of the condition
of the plant cells after 1 hour is correct?
A. burst
B. flaccid
C. plasmolysed
D. turgid
6. Which diagram represents active transport?

7. The diagram shows the bases in a section of DNA from one strand only.

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 A−C−T−T−C−A−G−T−C
What is the base sequence on the complementary DNA strand?
A. G−C−T−T−C−G−A−T−C
B. G−T−C−C−T−G−A−C−T
C. T−C−A−A−C−T−G−A−C
D. T−G−A−A−G−T−C−A−G
8. The graph shows the effect of pH on the rate of an enzyme-catalysed reaction.

What explains the effect of pH on the reaction rate?

A. As the pH increases from 5 to 7, the kinetic energy increases.
B. As the pH increases from 7 to 9, the frequency of enzyme and substrate collisions
increases.
C. The shape of the enzyme’s active site changes as the pH increases from 7 to 9.
D. The substrate denatures at pH 7.
9. Which sentence explains the importance of vascular bundles for photosynthesis?
A. Vascular bundles transport carbon dioxide to the leaf.
B. Vascular bundles transport oxygen to the leaf.
C. Vascular bundles transport starch to the leaf.
D. Vascular bundles transport water to the leaf.
10. Which substance is the product of protein digestion?
A. amino acids
B. fatty acids
C. glucose
D. glycerol

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11. Which organ produces amylase?
A. gall bladder
B. kidney
C. oesophagus
D. pancreas
12. Which substance is absorbed by lacteals in villi?
A. amino acids
B. fatty acids
C. lactic acid
D. hydrochloric acid
13. The diagram shows part of the alimentary canal.
Where is most water absorbed?
The diagram shows a cross-section of a villus.

14. On which cell surface are microvilli found?

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15. Which feature of xylem vessels provides support to plants?
A. cells are joined end to end
B. no cell contents
C. no cross-walls
D. lignin present
16. Which change in an environmental factor will increase the rate of transpiration?
A. decreasing humidity
B. decreasing light intensity
C. decreasing temperature
D. decreasing wind speed
17. Which statement describes translocation?
A. the movement of amino acids and sucrose from the source to the sink in phloem
B. the movement of amino acids and sucrose from the source to the sink in xylem
C. the movement of amino acids and sucrose from the sink to the source in phloem
D. the movement of amino acids and sucrose from the sink to the source in xylem
18. Which pathway is taken by blood in a fish?
A. gills → heart → body → gills
B. body → gills → heart → body
C. heart → gills → body → heart
D. heart → body → gills → body

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19. Which component of blood produces antibodies?
A. plasma
B. platelets
C. red blood cells
D. white blood cells
20. The cholera bacterium produces a toxin which affects humans.
What is an effect of this toxin on the human body?
A. the secretion of chloride ions from the blood into the lumen of the large intestine
B. the secretion of chloride ions from the blood into the lumen of the small intestine
C. the secretion of chloride ions from the lumen of the large intestine into the blood
D. the secretion of chloride ions from the lumen of the small intestine into the blood
21. These changes occur in the human body during exercise.

1 breathing rate increases

2 the rate of respiration increases

3 nerve impulses sent from the brain to the intercostal muscles and diaphragm

4 receptors in the brain detect increased concentration of carbon dioxide in the blood

What is the correct order for these changes?

A. 1 → 2 → 4 → 3
B. 1 → 3 → 4 → 2
C. 2 → 1 → 4 → 3
D. 2 → 4 → 3 → 1
22. Two molecules of glucose are aerobically respired.

How many molecules of water are produced?

A. 1 B. 2 C. 6 D. 12
23. Which substance has a higher concentration in the renal vein than in the renal artery?
A. carbon dioxide
B. glucose
C. oxygen

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 D. urea
24. Where are amino acids deaminated and converted into urea?
A. bladder
B. kidneys
C. liver
D. pancreas
25. Which process moves neurotransmitters across a synapse?
A. active transport
B. diffusion
C. gravity
D. osmosis
26. When the blood glucose concentration is low, which hormone is released and which organ
releases it?

27. A shoot grows towards the direction of light.

These statements compare shoot cells on the side in the light with cells on the side in the shade.

1 Cells on the side in the light have more auxin.

2 Cells on the side in the shade have more auxin.
3 Cells on the side in the light elongate more.
4 Cells on the side in the shade elongate more.

Which statements explain why the shoot grows towards the light?

A. 1 and 3 B. 1 and 4 C. 2 and 3 D. 2 and 4

28. Which statement about antibiotics is correct?

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 A. Antibiotics are used to treat all transmissible diseases.
B. Antibiotics are used to treat diseases caused by viruses.
C. Antibiotic resistance can be stopped by increasing their use.
D. Antibiotics are used to treat diseases caused by bacteria.
29. The graph shows how the mass of DNA per cell changes before, during and after a nuclear
division in a diploid cell.

Which row describes the type of nuclear division and the chromosome number of the
daughter cells shown in the graph?

30. In a family, the two parents have blood groups of A and B and the three children have blood
groups of B, B and O. What are the genotypes of the parents?

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31. Which statement describes a type of variation?
A. Continuous variation is usually caused by the environment only.
B. Continuous variation results in a limited range of phenotypes with no intermediates.
C. Discontinuous variation is usually caused by genes only.
D. Discontinuous variation results in a range of phenotypes between two extremes.
32. Which statement explains why the stomata are located on the upper surface of the leaf?

A. to allow carbon dioxide from the air to enter the leaf for use in photosynthesis
B. to allow carbon dioxide produced by photosynthesis to leave the leaf
C. to allow oxygen from the air to enter the leaf for use in photosynthesis
D. to allow oxygen from the water to enter the leaf for respiration
33. Which statement about antibiotics is correct?
A. Antibiotics do not affect bacteria but kill viruses.
B. Antibiotics do not affect bacteria or viruses.
C. Antibiotics kill bacteria and kill viruses.
D. Antibiotics kill bacteria but do not affect viruses.
34. What would lead to a decrease in blood glucose concentration?
A. increased release of adrenaline
B. increased release of amylase

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 C. increased release of glucagon
D. increased release of insulin
35. What describes how the body maintains a constant internal temperature on a hot day?
A. Vasoconstriction increases blood flow to the skin surface capillaries.
B. Vasoconstriction decreases blood flow to the skin surface capillaries.
C. Vasodilation increases blood flow to the skin surface capillaries.
D. Vasodilation decreases blood flow to the skin surface capillaries.
36. Vigorous exercise can cause an oxygen debt.
Which process removes the oxygen debt?
A. aerobic respiration of lactic acid in the liver
B. a decrease in breathing rate
C. a decrease in heart rate
D. an increase in blood supply to the skin
37. In healthy people, which substance is completely reabsorbed into the blood from the kidney
nephrons?
A. glucose
B. salts
C. urea
D. water
38. What would be the pupil size and lens shape of a person reading a mobile phone text
message in a brightly lit room?

39. Which statement about immunity is correct?

A. A part of the antibody molecule has the same shape as the antigen it acts on.
B. Babies develop passive immunity from the antibodies they receive in breast milk.

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 C. Phagocytes produce antibodies.
D. Vaccines contain weakened antibodies.
40. What is an advantage of having a double circulatory system?
A. It uses less energy because blood flows through the heart only once in each circuit around
the body.
B. Concentration gradients of solutes and gases are kept low.
C. Deoxygenated and oxygenated blood are separated to allow a high rate of oxygen supply
to the tissues.
D. It maintains high-pressure blood flow to the lungs and low-pressure blood flow to the body.

END
John 15:1-7

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