Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 4 - No. 11)
What effect does the size of the molecule have on the rate of diffusion?
Larger molecules diffuse faster.
The size of the molecule has no effect on the rate of diffusion.
Smaller molecules diffuse faster.
The size of the molecule determines the direction of diffusion.
Explanation
Smaller molecules diffuse more rapidly than larger ones, at a given temperature.
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