Active transport differs from passive transport in that active transport
A) requires energy.
B) never requires direct input of ATP.
C) moves molecules with a concentration gradient.
D) Both b and c
E) Both a and c

Question

Quizplus · Accepted Answer

Active transport requires energy in the form of ATP or from another energy source, while passive transport does not require energy. Active transport also moves molecules against their concentration gradient, while passive transport moves molecules with their concentration gradient. Choice B is incorrect because active transport always requires some form of energy input.

Active Transport Differs from Passive Transport in That Active Transport