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8.3 Respiration

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Question 8
F

A muscle needs more energy during vigorous exercise. Its oxygen supply is not sufficient to meet this demand by aerobic respiration alone.

Which change allows the muscle to continue contracting?

[1]
A

more ethanol is made aerobically, using carbon dioxide

B

more lactic acid is made aerobically, using carbon dioxide

C

more glucose is broken down anaerobically, producing lactic acid

D

more glucose is broken down anaerobically, producing ethanol

Markscheme

8.3 Respiration Questions

  1. GCSE
  2. /Biology
  3. /8.3 Respiration

42 exam-style questions on Edexcel GCSE Biology 8.3 Respiration, covering 8.3.1 Aerobic and anaerobic respiration. Each one has a worked solution and a mark scheme showing where the marks go.

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