A-LevelBiologyCell membranes and transportMay/June 2023Paper 1 Q181 Mark

A student measured the time taken for complete diffusion of a dye into agar blocks of different sizes which were suspended in the dye. The results are shown. [Figure 18.1] What is the predicted time for complete diffusion of the dye into the agar block measuring 5 mm x 10 mm x 15 mm?

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

The correct answer is A: 6.2 s.

Q: What topic does this question test?

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

A6.2 s

B16.1 s

C34.5 s

Dmore than 34.5 s

✓ Correct Answer

The correct answer is A: 6.2 s

📋 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 membranes and transport in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology May/June 2023 examination, Paper 1 Variant 2.

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