Why is cell membrane called a selectively permeable membrane? Options: A . &nbspIt is permeable only during certain stage of the cell division. B . &nbspIt allows only selective molecules to pass through it. C . &nbspIt allows only water to pass. D . &nbspIt is made up of lipids.

Why is cell membrane called a selectively permeable membrane?

Discussion Forum : The Fundamental Unit Of Life

Question - Why is cell membrane called a selectively permeable membrane?

Options:

A . It is permeable only during certain stage of the cell division.

B . It allows only selective molecules to pass through it.

C . It allows only water to pass.

D . It is made up of lipids.

Answer: Option B
:
B
Plasma membrane is an external covering of the cell. It separates the contents of the cell from the external surroundings. Since, it allows the entry and exit of only certain substances (e.g., molecules, ions, etc.) it is known as a selectively permeable membrane.

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