What is active transport?
A) Movement of molecules into or out of a cell using special proteins and not requiring an expenditure of energy
B) Rapid movement of molecules in a solution
C) Movement of molecules into or out of a cell against a concentration gradient
D) Diffusion of molecules within a cell
E) Movement of molecules into or out of a cell down a concentration gradient

Question

Quizplus · Accepted Answer

Active transport is the process by which molecules are moved into or out of a cell against a concentration gradient, which requires energy, typically in the form of ATP. This is because molecules are being moved from an area of lower concentration to an area of higher concentration, which is against the natural flow of diffusion and thus requires an input of energy.

What Is Active Transport