Question

Cells in \(G_0\) phase:

• A. exit the cell cycle
• B. enter the cell cycle
• C. suspend the cell cycle
• D. terminate the cell cycle

Answer 1

The Correct Option is C

The question asks about the characteristic of cells in the G_0 phase of the cell cycle. To understand the correct answer, let's examine what the G_0 phase is and its role within the cell cycle.

The cell cycle consists of several phases through which a cell goes in order to replicate and divide. These phases include:

• G₁ phase
• S phase (Synthesis)
• G₂ phase
• M phase (Mitosis)
• G₀ phase

Among these, the G_0 phase is a resting phase where the cell has left the cycle and has stopped dividing. It is considered a quiescent stage that is not a part of the active cycle. Cells in this stage have exited the cycle but have not necessarily permanently terminated their cycle; instead, they are in a state where they are neither dividing nor preparing to divide.

Given the options:

• Exit the cell cycle
• Enter the cell cycle
• Suspend the cell cycle
• Terminate the cell cycle

The correct answer is suspend the cell cycle. This is because:

1. The G_0 phase is not a definitive exit from the cell cycle, hence it's not a permanent termination (ruling out "terminate the cell cycle").
2. Cells do not prepare to enter when they are in G_0, which means they are not resuming cell cycle activities (ruling out "enter the cell cycle").
3. While cells may have exited the active phases, they are essentially suspending or pausing their cycle without definite exit or termination. Hence, "suspend the cell cycle" is the most accurate choice, as the cycle is halted temporarily but not abandoned.

In conclusion, cells in the G_0 phase are best described as suspending the cell cycle rather than completely terminating it or preparing to enter it. This understanding supports various physiological processes where cells function without the need for division.