Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 2 - No. 15)
Which of the following best describes what happens during facilitated diffusion?
Molecules move against their concentration gradient with the help of a protein.
Molecules move down their concentration gradient with the help of a protein.
Molecules move down their concentration gradient without any assistance.
Molecules move against their concentration gradient without any assistance.
Explanation
Facilitated diffusion involves movement down a concentration gradient (passive) with the help of a protein.
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