A-LevelBiologyCell membranes and transportOct/Nov 2017Paper 1 Q181 Mark
The graph shows how the rate of entry of substance X into a cell changes as the concentration of substance X outside the cell increases. [Figure 18.1 - graph of rate of entry vs concentration] The diagram shows part of a cell surface membrane. [Figure 18.2 - diagram of cell surface membrane] Which pathways could substance X use to enter the cell?
A1 and 2
B1 only
C2 and 3
D2 only
✓ 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...
📋 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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