The diagram shows part of a cell surface membrane. [Figure shows a fluid mosaic model of a cell membrane with components labelled 1 to 6] Which row correctly identifies functions of two of the numbered molecules?
✓ Correct Answer
The correct answer is A: molecule: 1, function: acts as an antigen, molecule: 4, function: stabilises the membrane
📋 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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