Molecules that permeate a plasma membrane by facilitated diffusion
A) require the aid of transport proteins.
B) move from an area of low concentration to an area of high concentration.
C) do so much more quickly than those crossing by simple diffusion.
D) require energy.

Question

Quizplus · Accepted Answer

Facilitated diffusion involves the use of transport proteins to help molecules cross the plasma membrane without the use of energy, moving down their concentration gradient.

Molecules That Permeate a Plasma Membrane by Facilitated Diffusion