Cambridge IGCSE · Biology (0610)

Photosynthesis: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Photosynthesis.

10 questions23 marksFree, no account

Question 1

1 mark

Which of the following is the correct word equation for the process of photosynthesis?

Question 2

1 mark

A student sets up an experiment with four different concentrations of sodium hydrogencarbonate solution and places an aquatic plant in each. They measure the volume of oxygen produced per hour. The results are shown below:

- Test 1: 0.1% solution, 5 \(cm^3\) oxygen
- Test 2: 0.2% solution, 12 \(cm^3\) oxygen
- Test 3: 0.4% solution, 18 \(cm^3\) oxygen
- Test 4: 0.8% solution, 18 \(cm^3\) oxygen

What can be concluded about the limiting factor in Test 4?

Question 3

1 mark

What is the primary significance of sucrose in the context of plant nutrition and carbohydrate management?

Question 4

1 mark

A plant is grown in a mineral-deficient solution and develops yellow leaves. Which mineral ion is most likely lacking in the solution?

Question 5

1 mark

During an investigation into the rate of photosynthesis, a student keeps temperature and light intensity constant while increasing the concentration of carbon dioxide. The rate of photosynthesis increases initially but then reaches a plateau. Which statement explains why the rate reaches a plateau?

Question 6

2 marks

Identify the specific substance produced during photosynthesis that is used to provide a sweet-tasting liquid in flowers to attract insects for pollination.

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Question 7

4 marks

Explain why the net exchange of carbon dioxide between a plant and its environment is zero at a specific light intensity known as the compensation point.

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Question 8

5 marks

During an investigation into the rate of photosynthesis, a student increases the temperature from \(20^\circ\text{C}\) to \(45^\circ\text{C}\) and observes a sharp decrease in oxygen production. Explain the biological reason for this result.

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Question 9

3 marks

Plants require specific mineral ions for healthy growth and to carry out the process of photosynthesis effectively.
(a) Identify the mineral ion required by plants to synthesise chlorophyll.
(b) Identify the mineral ion required for the production of amino acids.
(c) Describe the visible effect on a plant's leaves if it is grown in soil deficient in the mineral ion identified in part (a).

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Question 10

4 marks

The internal structure of a leaf is highly adapted to maximise the rate of photosynthesis.
(a) Explain why the palisade mesophyll cells are located directly beneath the upper epidermis and describe one structural adaptation of these cells.
(b) Describe the role of the spongy mesophyll layer in facilitating the diffusion of gases within the leaf.

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