Question

Assertion: Interphase is resting stage.
Reason: The interphase cell is metabolically inactive.

• A. Both assertion and reason are true and the reason is the correct explanation for the assertion.
• B. Both the reason and assertion are true but the reason is not the correct explanation for the assertion
• C. Assertion is true but reason is false
• D. Both the reason and assertion are false

Answer 1

The correct option is C Assertion is true but reason is false

Previously interphase was called resting stage because there is no visible activity related to cell division in this stage. Later studies proved that the interphase of a cell is metabolically quite active. Interphase consists of 3 subphases (G₁, G₂ and S). Synthesis of DNA occurs in S-phase. G₁ is the period of growth between the end of mitosis and start of S-phase. G₂ is the interval between S-phase and start of mitosis. As the synthesis of DNA occurs in S phase and the cell actively synthesises substances required for division during the growth phases (G1 and G2), we can conclude that the interphase is metabolically active.