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1.3 Respiration

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Question 1

Cells lining the small intestine use ATP for active transport. They must be supplied with 1.68 × 105 molecules of ATP.

Half of these ATP molecules are made by aerobic respiration and half are made by anaerobic respiration. Aerobic respiration makes 30 ATP molecules per glucose molecule. Anaerobic respiration makes 2 ATP molecules per glucose molecule.

How many glucose molecules are used altogether?

[1]
A

2.8×1032.8 \times 10^{3}2.8×103

B

4.48×1044.48 \times 10^{4}4.48×104

C

5.25×1035.25 \times 10^{3}5.25×103

D

4.2×1044.2 \times 10^{4}4.2×104

Markscheme

1.3 Respiration Questions

  1. GCSE
  2. /Biology
  3. /1.3 Respiration

113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.

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