Lipids are a diverse group of biomolecules that play crucial roles in the structure and function of cell membranes. The main types of lipids found in cell membranes include phospholipids, cholesterol, and glycolipids. Phospholipids are the most abundant lipid in cell membranes and consist of a hydrophilic head group and two hydrophobic fatty acid tails, forming a bilayer structure. Cholesterol helps to stabilize the membrane and regulate its fluidity, while glycolipids play a role in cell recognition and signaling. Together, these lipids create a dynamic and selective barrier that protects the cell and regulates the movement of molecules in and out of the cell.
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