Question

Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called the Quiescent Stage (G0). This process occurs at the end of?

• A. S phase
• B. G₂ phase
• C. M phase
• D. G₁ phase

Answer 1

The correct option is C

M phase

The correct option is C.

Explanation of correct option:

1. In the G₀ or Quiescent stage the cell is right after the mitotic or M phase.
2. In this stage the cell undergoes the state of non-division and performs its cellular activity.
3. Some cells are permanently in this stage like nerve cells and some again undergo division under the external influence like stem cells.

Explanation of incorrect options:

Option A:

1. In the S phase, the DNA in the nucleus duplicates itself.

Option B:

1. In the G₂ phase, The cell growth continues and it duplicates the protein and organelles and prepares itself for the M phase.

Option D:

1. In the G₁ phase the cell undergoes different changes to prepare the cell for the division phase.
2. Cell grows in size and organelles duplicate themselves.

Final answer: The cells enter into the Quiescent phase after the M phase.