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: Overview of the cell cycle. 
The cell cycle is divided into two major parts: Interphase and the M phase. Interphase includes three stages—G₁, S, and G₂

Step 2: Determining the resting stage.
The G₁ phase is often called the resting phase. In this stage, the cell is metabolically very active: it grows, synthesizes proteins and RNA, and carries out its normal functions. However, DNA replication does not occur during this phase.

Step 3: Why other phases are not resting.
S phase: This is the synthesis phase where DNA replication takes place.
G₂ phase: The cell prepares for mitosis by producing proteins and organelles needed for division.
M phase: This is the division phase where mitosis and cytokinesis occur.

Step 4: Final conclusion.
Because the cell mainly carries out routine activities without DNA replication or division, the G₁ phase is known as the resting phase of the cell cycle.