Protein molecules that pump substances across a membrane are called:
A) microfilaments.
B) microtubules.
C) transporters.
D) microvehicles

Question

Quizplus · Accepted Answer

Transporters are protein molecules that facilitate the movement of substances across a membrane, such as ion channels, carriers, and ATP-powered pumps. Microfilaments and microtubules are cytoskeletal components that maintain cell shape and aid in intracellular transport. Microvehicles is not a commonly used term in biology.

Protein Molecules That Pump Substances Across a Membrane Are Called