Question

Which phase of the cell cycle is known as the resting phase?

• A. G$_1$ phase
• B. S phase
• C. G$_2$ phase
• D. M phase

Hint:

The G$_1$ phase is called the resting phase because the cell is metabolically active but not dividing or replicating DNA.

Answer 1

The Correct Option is A

Step 1: Understanding the cell cycle.
The cell cycle consists of Interphase (G$_1$, S, and G$_2$ phases) and the M phase. Interphase is the longest phase where the cell grows and prepares for division.
Step 2: Identifying the resting phase.
G$_1$ phase is commonly referred to as the resting phase because the cell performs normal metabolic activities, grows in size, and prepares the necessary components for DNA synthesis. No DNA replication occurs during this phase.
Step 3: Analysis of other phases.
(B) S phase: DNA synthesis and replication occur.
(C) G$_2$ phase: The cell prepares for mitosis by synthesizing proteins and organelles.
(D) M phase: Actual cell division (mitosis) takes place.
Step 4: Conclusion.
Since the G$_1$ phase involves normal cellular activity without DNA replication or division, it is known as the resting phase of the cell cycle.