O-LevelBiologyCell Biology5090/12 · Oct/Nov 2021 · Q21 Mark
Which statement about diffusion is correct?
ADiffusion always involves the movement of water molecules.
BDiffusion depends on the presence of a partially permeable membrane.
CDiffusion only happens to molecules in a solution.
DDiffusion only involves molecules moving down a concentration gradient.
✓ Correct answer
D: Diffusion only involves molecules moving down a concentration gradient.
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