For Facilitated Diffusion to Occur It Requires

Question

For facilitated diffusion to occur it requires
A)energy.
B)a gradient.
C)a carrier protein.
D)a gradient and carrier protein.

Accepted Answer

Facilitated diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration, but it requires a carrier protein to facilitate the movement. Additionally, there must be a concentration gradient for the molecules to diffuse down. Therefore, the correct answer is D, as both a gradient and a carrier protein are necessary for facilitated diffusion to occur. Energy is not required since facilitated diffusion is a passive process.