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A-LevelBiologyTransport in mammalsMay/June 2023Paper 2 Q17 Marks

The sinoatrial node (SAN) and the atrioventricular node (AVN) have an important role in the control of the cardiac cycle. The timing of atrial and ventricular systole and diastole must be controlled so that blood passes through the heart efficiently.

Q: What topic does this question test?

This question tests Transport in mammals in A-Level Biology (syllabus code 9700). It is worth 7 marks.

📋 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 structured question tests Transport in mammals in A-Level Biology (syllabus code 9700). It is worth 7 marks.

Source

This question appeared in the Cambridge A-Level Biology May/June 2023 examination, Paper 2 Variant 2.

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