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4.2 Respiration

4.2 Respiration

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Question 1
F

A sealed flask contains actively respiring yeast in glucose solution. Oxygen is present at the start but is used up after several minutes. Which row correctly predicts the main products before and after the oxygen is used up?

[1]
A

Before: carbon dioxide and water; after: ethanol and carbon dioxide

B

Before: ethanol and water; after: lactic acid and carbon dioxide

C

Before: carbon dioxide and ethanol; after: carbon dioxide and water

D

Before: lactic acid and water; after: ethanol and carbon dioxide

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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