Four of the Following Statements are True Regarding Facilitated Diffusion

Question

Four of the following statements are true regarding facilitated diffusion.Which one is false?  
A) It requires a transport protein.
B) Movement follows the concentration gradient of the substance.
C) It can occur through a permanently open channel.
D) It requires ATP.
E) The transported substance and the transport protein are usually specific to each other.

Accepted Answer

Facilitated diffusion does not require ATP. It is a passive transport process that relies on the concentration gradient of the substance and the presence of a transport protein to move molecules across a membrane. The other statements are true - facilitated diffusion requires a transport protein, follows the concentration gradient, can occur through a permanently open channel, and is usually specific to the transported substance and transport protein.