Question

What is it called when a molecule moves across a semipermeable membrane into a region of high concentration?
A. Diffusion

B. Active transport

C. Passive transport

D. Osmosis

Answer 1

The answer is B. Active transport.

Answer 2

ANSWER:

Active transport

EXPLANATION:

Active transport is the passage of molecules across a membrane from a region of their lower concentration to a region of their higher concentration—in the direction opposite the concentration gradient. Active transport needs cellular energy to perform this translation