Cambridge IGCSE · Marine Science (0697)

Respiration: Practice Questions

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

10 questions26 marksFree, no account

Question 1

1 mark

Which statement accurately defines respiration in marine cells?

Question 2

1 mark

In the process of aerobic respiration, which molecule acts as the primary reactant that is broken down to release energy?

Question 3

1 mark

During a practical investigation into the energy content of food, a \(1\text{ g}\) sample of dried kelp is burned, raising the temperature of a fixed volume of water by \(10^{\circ}\text{C}\). A \(1\text{ g}\) sample of dried fish muscle raises the temperature by \(22^{\circ}\text{C}\) under identical conditions. Which statement is the most scientific conclusion?

Question 4

1 mark

All living cells in a marine organism carry out respiration. What is the fundamental reason for this universal process?

Question 5

1 mark

Which row correctly identifies the chemical word equation for aerobic respiration in marine organisms?

Question 6

2 marks

Respiration involves chemical reactions within marine cells. State the primary outcome of these reactions.

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Question 7

4 marks

Contrast the process of aerobic respiration in a marine mammal's cells with the burning of a dried food sample in a laboratory, specifically regarding how the stored chemical energy is released in each case.

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Question 8

5 marks

Explain why continuous respiration is critical for the maintenance of various life processes in a complex marine organism, providing specific examples of activities that require this energy.

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Question 9

4 marks

Define respiration and state the word equation for aerobic respiration.

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Question 10

6 marks

Distinguish between the processes of photosynthesis and aerobic respiration in marine organisms, explaining their key differences and how they are interrelated.

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