Diffusion during which the substance to be transported binds selectively to a membrane-spanning protein, which helps the process along, is called ________.
A)osmosis
B)facilitated osmosis
C)simple diffusion
D)facilitated diffusion
E)active transport

Question

Quizplus · Accepted Answer

The definition given describes facilitated diffusion, which involves the use of a membrane protein to help transport the substance across the membrane. Osmosis, simple diffusion, and active transport do not involve membrane-spanning proteins for transport. Facilitated osmosis is not a commonly used term in biology.

Diffusion During Which the Substance to Be Transported Binds Selectively