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Q. 2.     Why is the plasma membrane called a selectively permeable membrane?

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The plasma membrane is called a selectively permeable membrane because it relatively allows the movement of substances from the inside of the cell to the outside and vice-versa. This selectivity depends on the requirements of the cell and the substances present in the surroundings of the cell.

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Sayak

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Plasma membrane is called the selectively permeable membrane because it allows the entry of certain substances, exit of some substances while preventing passage to remaining substances. 

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Rupak Tripura

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