Question

What is the structure of a cell membrane?

Answer 1

Phospholipids and proteins...

Explanation:

A cell membrane mostly consists of phospholipids, those are lipids with a phosphate group `(PO_4^(3-))`, and are hydrophilic, meaning that they allow water to pass through, and some proteins, which might be needed to help move molecules through the membrane.

Cholesterol may also be found in the cell membrane to make it more flexible and stronger.

Source:

http://hyperphysics.phy-astr.gsu.edu/hbase/Biology/celmem.html