What is the advantage of a cell membrane?

The cell membranes are primarily composed of lipids (about 40%) & proteins (about 60%). Also have carbohydrates (1-10%)- present as glycolipids and glycoproteins. A cell membrane consists of 3 layers; a lipid bilayer coated on either side with a layer of protein. read more

The cytoplasm is bounded on the outside by a thin, delicate and flexible membrane known as cell membrane or plasma membrane (also called sarcolemma in case of muscle fibre cell and neurolemma in nerve cell). The cell membrane can not be seen under light microscope. read more

Another advantage is that without the cell wall, animal cells are much more mobile. Think of the cell wall as stilts under a kampong, it is a foundation for the plant which makes it more difficult to move around but the plasma membrane which is thin and flexible, the animal cell is like tent which is a portable house. read more