Question

Most of the functions of a cell membrane are performed by _____, but the membrane is mostly made of _____.

a. phospholipids . . . proteins proteins . . .
b. phospholipids carbohydrates . . . phospholipids
c. carbohydrates . . . cholesterol
d. proteins . . . carbohydrates

Answer 1

The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.