What is the primary difference between diffusion and facilitated diffusion?
A)One is active and the other is passive.
B)One requires ATP and the other does not.
C)Diffusion involves the movement of a substance from high concentration to a lower concentration.Facilitated diffusion moves a substance from a lower concentration to a higher concentration.
D)Facilitated diffusion uses a "helper" molecule to move a substance passively.

Question

Quizplus · Accepted Answer

The primary difference between diffusion and facilitated diffusion is that facilitated diffusion uses a "helper" molecule to move a substance passively across a membrane, while diffusion does not involve any helper molecule. Both diffusion and facilitated diffusion are passive processes that move substances from higher concentration to lower concentration. Neither of them requires ATP for the movement of substances. Therefore, the correct answer is D.

What Is the Primary Difference Between Diffusion and Facilitated Diffusion