A-LevelBiologyCell membranes and transportOct/Nov 2018Paper 1 Q41 Mark

The removal of a plant cell wall by enzyme digestion leaves an intact membrane-bound structure called a protoplast. Which statement explains why protoplasts are easily damaged?

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.

AMitochondria stop producing ATP to maintain membrane integrity.

BNet movement of water is no longer limited by turgor.

CSecretory vesicles are unable to fuse with the cell surface membrane.

DThe shape of the cell structures is changed by the loss of cell shape.

✓ Correct Answer

The correct answer is B: Net movement of water is no longer limited by turgor.

📋 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 Oct/Nov 2018 examination, Paper 1 Variant 2.

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