What feature of a membrane describes weather molecules can cross the membrane?

Answer 1

The feature of a membrane that determines whether molecules can cross is its selective permeability. This characteristic arises from the lipid bilayer structure, which allows certain small, nonpolar molecules to pass through freely while restricting larger, polar, or charged molecules. Additionally, specific transport proteins facilitate the movement of these restricted molecules across the membrane, either passively or actively. Thus, the composition and arrangement of the membrane's components play a crucial role in regulating molecular transport.