A-LevelBiologyCell membranes and transportMay/June 2024Paper 1 Q151 Mark
The diagram shows the entry of molecule X into a cell. [Diagram of molecule X entering a cell] Which row shows a property of molecule X and the effect of the concentration of ATP in the cytoplasm on the rate of entry of molecule X? [Table with columns 'property of molecule X', 'concentration of ATP in the cytoplasm']
Anon-polar affects rate of entry of molecule X
Bnon-polar has no effect on rate of entry of molecule X
Cpolar affects rate of entry of molecule X
Dpolar has no effect on rate of entry of molecule X
✓ Correct Answer
The correct answer is D: polar has no effect on rate of entry of molecule X
📋 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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