Which structure prevents water-soluble molecules from entering cells across the plasma membrane?
A)Carbohydrate chains
B)Glycoprotein channels
C)Membrane channel proteins
D)Lipid 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 the water-soluble molecules 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 oxygen (O₂) and carbon dioxide (CO₂), to diffuse through it readily. Carbohydrate chains, glycoprotein channels, and membrane channel proteins do not prevent water-soluble molecules from entering cells across the cell membrane.

Which Structure Prevents Water-Soluble Molecules from Entering Cells Across the Plasma