Proteins that allow the diffusion of ions across membranes in the direction of their concentration gradients are most likely

Question

Quizplus · Accepted Answer

Channel proteins form hydrophilic pores in the membrane that allow ions to passively diffuse down their concentration gradients. Carrier proteins bind to specific ions or molecules and undergo a conformational change to transport them across the membrane, but this requires energy and is not strictly passive diffusion. Aquaporins are specialized channel proteins that selectively facilitate the diffusion of water molecules. Active transport pumps use energy to move ions against their concentration gradients.

Proteins That Allow the Diffusion of Ions Across Membranes in the Direction