A-LevelBiologyCell structureFeb/Mar 2019Paper 1 Q21 Mark

The diameter of a red blood cell in a diagram was measured as 2.5 cm. The actual diameter of the red blood cell was 7 µm. Which calculation would give the correct magnification for the red blood cell in the diagram?

Q: What is the correct answer to this A-Level Biology question?

The correct answer is C: 25000 / 7.

Q: What topic does this question test?

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

A7 / 25000

B2500 / 7

C25000 / 7

D25000 / 7000

✓ Correct Answer

The correct answer is C: 25000 / 7

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

Source

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

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