Question

multiple choice question
plasma membranes are made of proteins and ______.

○ glycerol
○ amino acids
○ nucleotides
○ phospholipids

Explanation:

Plasma membranes have a phospholipid bilayer as their structural framework, with proteins embedded or associated with this layer. Glycerol is a component of phospholipids, amino acids are building blocks of proteins, and nucleotides form nucleic acids, none of which are the main paired component with proteins in plasma membranes.

Answer:

D. phospholipids