A-LevelBiologyCell membranes and transportFeb/Mar 2021Paper 1 Q141 Mark
Which statements about the fluid mosaic model of a membrane are correct? 1 The movement of phospholipids in the membrane is reduced if the fatty acid tails are saturated. 2 Glycoproteins in the outer layer of the membrane can move. 3 Channel proteins are fixed in position.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of cell membranes and transport within the Biologysyllabus. The examiner's mark scheme requires...
📋 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...
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