Essential Biochemistry - Cell And Membrane Transport (Section 1 - No. 42)
What is facilitated diffusion?
The movement of molecules across a membrane with the help of a transport protein, without energy.
The movement of molecules across a membrane against their concentration gradient.
The movement of water molecules across a membrane.
The movement of small nonpolar molecules across a membrane.
Explanation
Facilitated diffusion requires a transport protein but does not require energy.
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