Cambridge IGCSE · Biology (0610)

Anaerobic respiration: Practice Questions

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

10 questions25 marksFree, no account

Question 1

1 mark

Which of the following is the word equation for anaerobic respiration in yeast?

Question 2

1 mark

During the process of bread-making, yeast respires anaerobically. What is the primary purpose of this specific metabolic pathway in the dough?

Question 3

1 mark

After a period of vigorous exercise, an athlete continues to breathe more deeply and at a faster rate than at rest. How does this specifically help in the removal of the oxygen debt?

Question 4

1 mark

During strenuous exercise, what substance accumulates in human muscle cells due to anaerobic respiration?

Question 5

1 mark

Which statement correctly identifies the production of carbon dioxide during anaerobic respiration in yeast and in human muscle cells?

Question 6

3 marks

Describe the specific role of the gas produced during the anaerobic respiration of yeast in the commercial process of bread-making.

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Question 7

5 marks

Explain the physiological necessity for an individual to maintain a high heart rate and deep breathing rate for several minutes after they have finished a period of intense, anaerobic exercise.

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Question 8

3 marks

Explain why anaerobic respiration releases much less energy per glucose molecule compared to aerobic respiration.

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Question 9

4 marks

(a) Explain what anaerobic respiration is.
(b) Write the word equation for anaerobic respiration in yeast and in human muscles.
(c) Describe one commercial application of anaerobic respiration in yeast.

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Question 10

5 marks

(a) State the balanced chemical equation for anaerobic respiration in yeast: \(C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2\).

(b) Describe the role of anaerobic respiration in the production of biofuels.

(c) In bread-making, yeast is added to dough. Explain how the products of anaerobic respiration contribute to the final texture and volume of the bread, and state what happens to the ethanol produced during the baking process.

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