A-LevelBiologyTransport in mammalsOct/Nov 2022Paper 1 Q351 Mark

Which statement about the structure of the heart is correct?

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.

AThe semilunar valves close when the pressure in the ventricles falls lower than the pressure in the arteries.

Bmuscle called the septum separates the atria from the ventricles.

CThere is a small patch of tissue in the right atrium that acts to delay the electrical impulse.

DClosure of valves in the veins prevents backflow of blood into the ventricles.

✓ Correct Answer

The correct answer is A: The semilunar valves close when the pressure in the ventricles falls lower than the pressure in the arteries.

📋 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 Oct/Nov 2022 examination, Paper 1 Variant 2.

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