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What do membrane phospholipids do?

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As membrane components, phospholipids are selectively permeable (also called semi-permeable), meaning that only certain molecules can pass through them to enter or exit the cell. Molecules that dissolve in fat can pass through easily, while molecules that dissolve in water cannot. read more

Phospholipids form double-layered membranes that are called phospholipid bilayers. These bilayers are essential for the cell to have a defined volume and internal structures. Phospholipid bilayers make it possible for cells to have organelles, such as the nucleus, which stores DNA. read more

Phospholipids are composed of two fatty acid chains and one glycerol compound. The fatty acid chains act as the tails of the phospholipid while glycerol acts as a head. The glycerol molecule also attaches to a phosphate group. read more

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