Question

The cell membrane is described as highly selective, because it bars the passage of most but not all substances. what structural feature of the membrane acts like gates that allow certain substances, including water, to pass through the membrane?

a. Permanent gaps in the lipid layer
b. Proteins that temporarily dissolve regions of the lipid bilayer
c. Channels in transmembrane proteins embedded in the lipid bilayer
d. Channels in phosphat groups at the outer edges of the lipid bilayer

Answer 1

C because proteins station themselves inside the membranes and act as a tunnel or passage to let bigger molecules in.