Question

Assertion (A): G₁ phase is the interval between mitosis and initiation of DNA replication.

Reason (R): The cell is metabolically inactive during G₁ phase.

विकल्प

• 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

A is true but R is false.

Explanation:

The assertion is true because the G₁ phase (Gap 1) specifically represents the post-mitotic interval that occurs right after cell division (mitosis) and finishes just before the initiation of DNA replication (S phase). However, this is false because the cell is exceptionally active metabolically during the G₁ phase, continuously growing, producing energy, and synthesising various proteins and RNA strands needed for future replication.