Which of the following processes can move a solute against its concentration gradient?
A) osmosis
B) passive transport
C) facilitated diffusion
D) active transport

Question

Quizplus · Accepted Answer

Active transport is the only process listed that can move a solute against its concentration gradient. This is accomplished by using energy (usually in the form of ATP) to pump the solute from an area of low concentration to an area of high concentration. Osmosis, passive transport, and facilitated diffusion all move solutes down their concentration gradient, from areas of high concentration to areas of low concentration.

Which of the Following Processes Can Move a Solute Against