A-LevelBiologyTransport in mammalsMay/June 2019Paper 1 Q271 Mark

The diagram shows a cross-section through a mammalian heart. [Figure: Cross-section of a mammalian heart with W and X labelled] Which chambers of the heart are represented by W and X?

Q: What topic does this question test?

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

AW: left ventricle, X: right ventricle

BW: right atrium, X: left atrium

CW: right atrium, X: right ventricle

DW: right ventricle, X: left ventricle

✓ Correct Answer

The correct answer is D: W: right ventricle, X: left ventricle

📋 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 Transport in mammals in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology May/June 2019 examination, Paper 1 Variant 2.

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