Active transport usually moves molecules
A) in the same direction as diffusion moves them.
B) in a direction opposite to the one in which diffusion moves them.
C) in a direction that tends to bring about equilibrium.
D) toward higher pH.
E) toward higher osmotic potential.

Question

Quizplus · Accepted Answer

Active transport moves molecules against their concentration gradient, which is the opposite direction of diffusion. This requires energy input, such as ATP, to transport the molecules. Therefore, active transport moves molecules in a direction opposite to the one in which diffusion moves them.

Active Transport Usually Moves Molecules