A-LevelBiologyGas exchange9700/12 · Feb/Mar 2025 · Q331 Mark

Which rows correctly summarise the typical distribution of cartilage and smooth muscle within different parts of the gas exchange system of humans?

A1, 2 and 3

B1 and 2 only

C1 and 3 only

D2 and 3 only

✓ Correct answer

C: 1 and 3 only

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Topic: Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2025 Paper 1 Variant 2, question 33.

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