What prevents water-soluble molecules from entering cells across the plasma membrane?
A)Carbohydrate chains
B)Glycoprotein channels
C)Membrane channel proteins
D)Phospholipid bilayer

Question

Quizplus · Accepted Answer

The bilayer's structure accounts for one of the essential functions of the plasma membrane-it is impermeable to most water-soluble molecules (molecules that dissolve in water) because they are insoluble in the oily core region. The bilayer serves as a barrier to the diffusion of water and hydrophilic substances while allowing lipid-soluble molecules, such as O₂ and CO₂, to diffuse through it readily.

What Prevents Water-Soluble Molecules from Entering Cells Across the Plasma