Explain the role of lipids in biological membranes. How do amphipathic molecules like phospholipids organize in water?

Lipids play a crucial role in the structure and function of biological membranes. They are the fundamental components of cell membranes, providing both structural integrity and functional properties essential for cellular activities. The primary function of lipids in biological membranes is to form a semi-permeable barrier that separates the internal environment of the cell from the external surroundings, regulating the movement of molecules in and out of the cell. This selective permeability is vital for maintaining homeostasis within the cell, allowing it to control the intake of nutrients, expulsion of waste, and communication with other cells.

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