Question

Define cell membrane and state its functions.

Answer 1

Cell membrane or plasma membrane is a thin, delicate membrane surrounding the cytoplasm. Following are the functions of cell membrane:

• It separates the cells from one another and also separates the cells from the surrounding medium.

• It gives a definite shape to the cell.

• Being porous, it allows the movement of substances from both inside and outside the cells.

• Its porous structure helps in regulating the movement of materials through the cells.