Question

Assertion (A): Cell growth results in disturbing the ratio between the nucleus and cytoplasm.

Reason (R): Mitosis helps the cell to restore the nucleocytoplasmic ratio.

Options

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is the correct explanation of A.

Explanation:

The assertion is true because as a cell grows during interphase, its cytoplasmic volume expands rapidly while the size of the nucleus remains virtually unchanged, directly disrupting the nucleocytoplasmic ratio. The reason is also true and provides the exact explanation because this physical imbalance triggers the cell to undergo mitosis. By dividing the enlarged cytoplasm into two distinct daughter cells, mitosis successfully reduces individual cytoplasmic volumes and restores the optimal, functional balance between the nucleus and the cytoplasm.