Facilitated diffusion and active transport both
A) require ATP.
B) require the use of proteins as carriers or channels.
C) carry ions and not small molecules.
D) increase without limit as the concentration gradient increases.
E) depend on the solubility of the solute in lipids.

Question

Quizplus · Accepted Answer

Both facilitated diffusion and active transport require the use of proteins as carriers or channels to move substances across the membrane. They differ in that facilitated diffusion moves substances down their concentration gradient without the need for ATP, while active transport moves substances against their concentration gradient and requires ATP.

Facilitated Diffusion and Active Transport Both