Question

What is plasma membrane or cell membrane

Answer 1

All cells are surrounded by a plasma membrane. The membrane is composed of a phospholipid bilayer arranged back-to-back. The membraneis also covered in places with cholesterol molecules and proteins. The plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell.

Answer 2

It is a membrane that gives shape and protection to the cells. It is made of bi-layer lipids which means 2 layers of liquid fats. They also control what goes in and what goes out of the cell like oxygen, carbon dioxide, water, etc.