Question

the cell membrane is made mainly of: phospholipids peripheral proteins integral proteins cholesterol

Explanation:

The cell - membrane is a phospholipid bilayer. Phospholipids are the main structural component, forming a barrier that regulates the movement of substances in and out of the cell. Peripheral and integral proteins are embedded or associated with the membrane but are not the main component. Cholesterol is also present in the membrane but in smaller amounts compared to phospholipids.

Answer:

phospholipids