Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 2 - No. 38)
What is a key difference between facilitated diffusion and diffusion?
Facilitated diffusion requires energy while diffusion does not.
Facilitated diffusion moves against the concentration gradient while diffusion moves with the gradient.
Facilitated diffusion uses transport proteins while diffusion does not.
Diffusion requires water while facilitated diffusion does not.
Explanation
Facilitated diffusion requires protein channels to cross the membrane, while diffusion does not.
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