The substances in cell membranes that form a barrier to the movement of materials across the membrane are
A) nucleic acids.
B) external proteins.
C) carbohydrates.
D) internal proteins.
E) lipids.

Question

Quizplus · Accepted Answer

Lipids, specifically phospholipids, form the bilayer of cell membranes, creating a hydrophobic barrier that regulates the movement of materials in and out of the cell.

The Substances in Cell Membranes That Form a Barrier to the Movement