Question

Which phase in cell cycle is also known as quiescent phase ?

• A. S
• B. G₁
• C. G₂
• D. G₀

Hint:

This is the phase cells exit into when they stop actively dividing.

Answer 1

The Correct Option is D

Step 1: The cell cycle normally proceeds through G1, S, G2 and M phases in sequence as a cell prepares for and undergoes division.

Step 2: Some cells, instead of continuing through G1 into S phase, exit the active cycle and enter a resting state called G0, in which they remain metabolically active but do not divide.

Step 3: This G0 state is specifically referred to as the quiescent phase, examples include many fully differentiated nerve or muscle cells that stay in G0 permanently. S phase is DNA synthesis, G1 is growth before DNA replication, and G2 is growth after DNA replication and before mitosis, none of which are described as quiescent.

Step 4: So the correct answer is G0.