Question

which statement is true of both active transport and facilitated diffusion?
o both involve proteins in the cell membrane.
o both move materials down a concentration gradient.
o both occur in only one direction.
o both require atp.

Explanation:

Active transport uses carrier - proteins and requires energy (ATP) to move substances against the concentration gradient. Facilitated diffusion uses carrier or channel - proteins to move substances down the concentration gradient without energy (ATP). Both processes involve proteins in the cell membrane. Movement in facilitated diffusion can occur in both directions depending on the concentration gradient, and only active transport requires ATP.

Answer:

Both involve proteins in the cell membrane.