The process of ________ involves a carrier protein that can transport a molecule across the cell membrane down its concentration gradient.
A) simple diffusion
B) facilitated diffusion
C) osmosis
D) bulk transport
E) active transport

Question

Quizplus · Accepted Answer

Facilitated diffusion involves the use of a carrier protein to transport molecules across the cell membrane down their concentration gradient, meaning from an area of high concentration to an area of low concentration. This differs from active transport, which requires energy expenditure to move molecules against their concentration gradient, and from simple diffusion, which does not require a carrier protein. Osmosis refers specifically to the movement of water molecules across the cell membrane, while bulk transport refers to the movement of large molecules or substances into or out of the cell, typically via vesicles.

The Process of ________ Involves a Carrier Protein That Can