Question

what are the two function of plasma membrane

Answer 1

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The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

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Answer 2

1. they keep the toxic substances out of the cell.
2. they contains receptor and channels that allow specific molecules , such as ions , nutrients , wastes and metabolic products , that mediate cellular and extracellular activities to pass organelles