Question

What is plasma membrane ?what are its functions.

Answer 1

All cells are surrounded by a plasma membrane. The membrane is composed of a phospholipid bilayer arranged back-to-back. The membrane is also covered in places with cholesterol molecules and proteins. The plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell.

Answer 2

Plasma membrane is the outermost membrane of a plant cell.
The primary function of the plasma membrane is to protect the cell from itssurroundings. 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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