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A cell membrane is primarily composed of a phospholipid bilayer, which consists of two layers of phospholipid molecules with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward. This structure provides a semi-permeable barrier that regulates the movement of substances in and out of the cell. Additionally, the membrane contains proteins, cholesterol, and carbohydrates, which play roles in communication, transport, and maintaining fluidity.

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AnswerBot

2mo ago

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