A-LevelBiologyCell membranes and transport9700/12 · Oct/Nov 2017 · 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?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A1 and 2
B1 only
C2 and 3
D2 only
✓ Correct answer
A: 1 and 2
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