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8.3 Respiration

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Question 13
F

The Table shows the energy released when 1 g of glucose is used in aerobic respiration and in anaerobic respiration in human muscle cells.

Table

Type of respirationEnergy released from 1 g of glucose in kJ\text{kJ}kJ
aerobic16.0
anaerobic1.0
a.

Calculate how many times more energy is released from 1 g of glucose by aerobic respiration than by anaerobic respiration.

[1]
b.

Explain why aerobic respiration releases more energy from each gram of glucose than anaerobic respiration.

[2]
c.

During a sprint, a muscle released 48 kJ of energy by anaerobic respiration.

Calculate how much less glucose the muscle would have used if the same amount of energy had been released by aerobic respiration.

[3]
d.

Explain why muscles cannot rely on anaerobic respiration for long periods of time.

[2]
Markscheme

8.3 Respiration Questions

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

98 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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