Small, charged molecules can cross the cell membrane through ____.
A) diffusion
B) ribosomes
C) mitochondria
D) protein channels

Question

Quizplus · Accepted Answer

Small, charged molecules cannot diffuse across the cell membrane because they are repelled by the hydrophobic (water-fearing) interior of the membrane. However, protein channels in the membrane act as selective gates that allow specific small, charged molecules to pass through.

Small, Charged Molecules Can Cross the Cell Membrane Through ____