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4.2 Respiration

4.2 Respiration

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Question 23
H

After vigorous exercise, which process directly contributes to repayment of the oxygen debt?

[1]
A

Lactic acid is transported to the lungs and converted directly into carbon dioxide

B

Lactic acid is retained in muscles and converted directly into ethanol during recovery

C

Lactic acid is transported to the liver and converted back into glucose using oxygen

D

Lactic acid is transported to the kidneys and converted directly into urea using oxygen

Markscheme

4.2 Respiration Questions

  1. GCSE
  2. /Biology
  3. /4.2 Respiration

51 exam-style questions on AQA GCSE Biology 4.2 Respiration, covering 4.2.1 Aerobic and anaerobic respiration, 4.2.2 Response to exercise, and 4.2.3 Metabolism. Each one has a worked solution and a mark scheme showing where the marks go.

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