The component of the plasma membrane that acts as a selective barrier to diffusion of polar molecules is the integral proteins.

Question

Quizplus · Accepted Answer

The component of the plasma membrane that acts as a selective barrier to diffusion of polar molecules is the phospholipid bilayer, which is made up of hydrophilic (polar) heads and hydrophobic (nonpolar) tails. Integral proteins may assist in selective transport across the membrane, but they are not the main barrier to polar molecules.

The Component of the Plasma Membrane That Acts as a Selective