A-LevelBiologyCell membranes and transport9700/12 · May/June 2020 · Q181 Mark
What are the features of facilitated diffusion? 1 It uses protein channels in the membrane and is driven by the energy from ATP. 2 It moves molecules from regions of higher concentration to lower concentration and is driven by the kinetic energy of the molecules which are diffusing. 3 It uses protein channels in the membrane, and the maximum rate of diffusion depends on the number of these channels.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
D: 2 and 3 only
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