It has particular folds because it improves the efficiency of a variety of processes that occur across a cell's membrane by increasing the surface area available for the proteins that manage those processes.
The cell membrane is found in both plant and animal cells. The animal cell membrane cholesterol, but plant cell does not.
Cholesterol molecules are scattered in the lipid bilayer, which help keep the membrane fluid consistent.
The cell membrane are the thin, flexible barrier around a cell. The cell membrane also regulates what enters and leaves the cell.
The cell membrane kinda represents teachers a little bit because the teachers can control what comes in and out of their classroom.