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4.2 Respiration

4.2 Respiration

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Question 2
H

A student investigated the effect of temperature on the rate of respiration in yeast by measuring the volume of carbon dioxide produced each minute. The figure shows the student's results.

Figure: The rate of carbon dioxide production by a yeast culture at six different temperatures

image

a.

Describe the effect of temperature on the rate of respiration in the yeast.

[2]
b.

Explain why the rate of respiration falls above 40 °C.

[2]
c.

Give one variable the student should have controlled.

[1]
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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