Question 1.1 [20 marks]

1.1 Multiple Choice Questions: Various options are provided as possible answers
to the following questions. Choose the correct answer and write only the letter
(A to D) next to the question number.
Question 1.1.1 [2 marks]
Below is the equation for photosynthesis. Which substance is represented by X.
Figure 1: word equation for photosynthesis
A. water
B. carbon
C. glucose
D. starch
Question 1.1.2 [2 marks]
Which factor does not affect the rate of photosynthesis?
A. oxygen concentration
B. temperature
C. light intensity
D. carbon dioxide concentration
Question 1.1.3 [2 marks]
An animal that eats plants only.
A. heterotroph
B. omnivore
C. carnivore
D. herbivore
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Question 1.1.4 [2 marks]
The following is a list of steps in a test for starch in green leaves:
(i) immerse leaves in iodine solution
(ii) boil leaves in water
(iii) rinse leaves in water
(iv) boil leaves in alcohol
Which is the correct sequence of steps?
A. (i), (iii), (ii), (iv)
B. (ii), (iv), (iii), (i)
C. (iii), (i), (iv), (ii)
D. (iv), (ii), (i), (iii)
Question 1.1.5 [2 marks]
The rate of breathing is regulated by the…….
A. heart
B. pulse rate
C. medulla oblongata
D. pituitary gland
Question 1.1.6 [2 marks]
The light phase of photosynthesis is so-called because:
A. it happens in the light
B. it is dependent on light
C. it requires carbon dioxide
D. it follows the light phase
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Question 1.1.7 [2 marks]
The following diagram represents an alveolus.
Figure 2: Structure of an alveolus.
Where would a high concentration of carbon dioxide be found?
A. C
B. B
C. A
D. D
Question 1.1.8 [2 marks]
Which of the following stages of cellular respiration does not depend on oxygen?
A. oxidative phosphorylation
B. glycolysis
C. krebs cycle
D. none of the above
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Question 1.1.9 [2 marks]
An excretory organ.
A. eye
B. oesophagus
C. bladder
D. ear
Question 1.1.10 [2 marks]
Which is NOT a function of the stomach?
A. storage of food.
B. synthesizing many proteins and other compounds.
C. mechanical digestion
D. chemical digestion.
TOTAL: [2 x 10 = 20]
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Question 1.2 [10 marks]
Give the correct biological term for each of the following descriptions. Write only
the term next to the question number.
Question 1.2.1 [1 mark]
The double membrane that covers the outer surface of the lungs.
Question 1.2.2 [1 mark]
The gas is essential for the oxidative process to occur.
Question 1.2.3 [1 mark]
Controls all the activities of the cell.
Question 1.2.4 [1 mark]
A measure of the height above sea level.
Question 1.2.5 [1 mark]
Muscles located between the ribs in the chest wall.
Question 1.2.6 [1 mark]
Substance used to test for starch.
Question 1.2.7 [1 mark]
The splitting of water molecules into hydrogen and oxygen in the presence of
light.
Question 1.2.8 [1 mark]
The phase where light is required for photosynthesis.
Question 1.2.9 [1 mark]
Transports organic nutrients around the plant, from the leaves to where they
are needed in the plant.
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Question 1.2.10 [1 mark]
Breakdown of complex molecules into simpler ones.
TOTAL: [1 x 10 = 10]
Question 1.3 [10 marks]
Indicate whether each of the descriptions in Column I applies to A ONLY, B
ONLY, BOTH A and B or NONE of the items in Column II. Write A only, B only,
both A and B or none next to the question number.
Column I Column II
1.3.1 Organisms that are able to make their own
food.
A: Heterotrophs
B: Autotrophs
1.3.2 Elimination of undigested food, usually via
defecation.
A: Egestion
B: Ingestion
1.3.3 Teeth for biting off pieces of food and for
cutting.
A: Canines
B: molars
1.3.4 Feelings of worry or tension that are caused
by a difficult situation.
A: Depression
B: Anxiety
1.3.5 Molecule that consists of two phosphate
groups.
A: ATP
B: ADP