What is the composition of the cell membrane?
The cell membrane is composed of a lipid bilayer, which consists of phospholipids, cholesterol, and proteins. Phospholipids are the most abundant type of lipid in the cell membrane and form the basic structure of the lipid bilayer. Cholesterol helps to stabilize the membrane and regulate its fluidity. Proteins are embedded within the lipid bilayer and can function as channels, receptors, enzymes, or structural support for the membrane. Together, these components create a selectively permeable barrier that separates the cell from its external environment and allows for the regulation of molecular transport in and out of the cell.
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