What is occurring when a transport protein uses energy to pump a solute across a cell membrane against its concentration gradient?
A)osmosis
B)passive diffusion
C)facilitated diffusion
D)phagocytosis
E)active transport

Question

Quizplus · Accepted Answer

When a transport protein uses energy to pump a solute across a cell membrane against its concentration gradient, it is an example of active transport. This is because the process requires the input of energy to move the solute against its natural flow. Osmosis, passive diffusion, facilitated diffusion, and phagocytosis do not involve the active pumping of a solute against its concentration gradient.

What Is Occurring When a Transport Protein Uses Energy to Pump