Passive processes that move substances across membranes ________.
A) utilize ATP
B) employ protein pumps
C) transport substances against their concentration gradients
D) require no ATP
E) include exocytosis and endocytosis

Question

Quizplus · Accepted Answer

Passive processes do not require energy, so they do not utilize ATP or employ protein pumps to move substances across membranes. They also do not transport substances against their concentration gradients. Instead, passive processes rely on simple diffusion or facilitated diffusion, which do not require ATP. Exocytosis and endocytosis are active processes that involve the use of energy to move substances into or out of the cell.

Passive Processes That Move Substances Across Membranes ________