Some membrane proteins have carbohydrates attached to them, forming glycoproteins that act as identification markers. Each cell in an Individual has the exact same glycoprotein and it allows the WBC cells that check ID to be sure that it belongs. These are sometimes called self markers.
The cell wall or membrane keeps it separate from the environment.
the outer membrane
cholestrol
Plasma membrane
It's protein
The functions that the lipid bilayer component of the cell membrane does not provide for the cell are controls that exchange of mater and chemical information between one cell and adjacent cells or environment. The lipid bilayer provides an impermeable, self sealing membrane capable of dividing or fusing the cell without breaking.
Phospholipids are the major component of cell membranes, but there are proteins, glycoproteins and cholesterol also in the membrane.
The cell wall or membrane keeps it separate from the environment.
the outer membrane
cholestrol
Lipids
Could be the membrane or cell wall
The cell membrane
A component is the Sodium ion channel.
14
Organelle
It's protein