Question

Which statement is true of both active transport and passive transport?

Active transport requires proteins and energy, passive transport only requires energy.


Both require ATP.

Active transport requires proteins and energy, passive transport does not require either.


Both move materials down a concentration gradient.

Answer 1

Both active transport and passive transport require membrane proteins, but active transport also requires ATP to move substances against their concentration gradient, while passive transport does not require energy.

Step-by-step explanation:

The statement that is true of both active transport and passive transport is that both require membrane proteins to facilitate the transport of substances. However, there is a fundamental difference in the energy requirements of these two types of transport. Active transport requires energy in the form of adenosine triphosphate (ATP) and the aid of transport proteins to move substances against their concentration gradient, typically from an area of lower concentration to an area of higher concentration. Conversely, passive transport does not require any form of energy such as ATP and occurs when substances move along their concentration gradient, that is, from an area of higher concentration to an area of lower concentration.

Answer 2

The answer is D, both move materials down a concentration gradient. The other answers are incorrect because passive transport does not require energy (ATP), but does use proteins.