A-LevelBiologyGas exchangeFeb/Mar 2022Paper 1 Q351 Mark

Which statement helps to explain why there is no cartilage in the walls of the bronchioles?

Q: What topic does this question test?

This question tests Gas exchange in A-Level Biology (syllabus code 9700). It is worth 1 mark.

ACartilage would make the bronchioles too narrow.

BGases must diffuse across the walls of the bronchioles.

CSmooth muscle is sufficient to support the walls of the bronchioles.

DThe bronchiole walls do not need to change shape.

✓ Correct Answer

The correct answer is C: Smooth muscle is sufficient to support the walls of the bronchioles.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This multiple-choice question tests Gas exchange in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology Feb/Mar 2022 examination, Paper 1 Variant 2.

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