Question

question 19 of 25 what is it called when a molecule uses energy to move across a semipermeable membrane? a. osmosis b. passive transport c. active transport d. diffusion

Explanation:

Active transport requires energy to move molecules across a semi - permeable membrane against their concentration gradient. Osmosis is the diffusion of water. Passive transport does not use energy. Diffusion is the movement of molecules from high to low concentration without energy input.

Answer:

C. Active transport