A-LevelBiologyCell membranes and transportFeb/Mar 2019Paper 1 Q181 Mark
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?
Amolecule: 1, function: acts as an antigen, molecule: 4, function: stabilises the membrane
Bmolecule: 2, function: acts as a receptor, molecule: 5, function: active transport
Cmolecule: 3, function: facilitated diffusion, molecule: 4, function: regulates the fluidity of the membrane
Dmolecule: 6, function: active transport, molecule: 5, function: acts as an enzyme
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of cell membranes and transport within the Biologysyllabus. The examiner's mark scheme requires...
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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...
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