Question

the lipid layer that forms the foundation of cell membranes is primarily composed of molecules called _______.
multiple choice
○ phospholipids
○ proteins
○ cholesterol
○ carbohydrates

Explanation:

Cell membranes' lipid layer foundation is mainly phospholipids. Proteins have other roles (e.g., transport), cholesterol modulates fluidity, carbohydrates are for cell recognition. Phospholipids form the bilayer structure.

Answer:

A. phospholipids