Antephase is the phase in which ATP is synthesised during cell division.It refers to

Options

A. `G_(0)`-phase
B. `G_(1)`-phase
C. S-phase
D. `G_(2)`-phase

Answer

To answer the question regarding the phase in which ATP is synthesized during cell division, we need to analyze the different phases of the cell cycle.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle Phases**:
- The cell cycle consists of several phases: G0, G1, S, G2, and M (mitosis).
- Each phase has specific functions related to cell growth, DNA replication, and preparation for division.

2. **Analyzing the G0 Phase**:
- The G0 phase is known as the quiescent phase.
- In this phase, cells are metabolically active but do not proliferate or divide.
- Therefore, ATP synthesis is not specifically emphasized in this phase.

3. **Analyzing the G1 Phase**:
- The G1 phase is the first gap phase after cell division.
- During G1, the cell grows and synthesizes proteins and organelles, but it does not replicate its DNA.
- While ATP may be produced, it is not the primary focus of this phase.

4. **Analyzing the S Phase**:
- The S phase is where DNA replication occurs.
- Cells synthesize a complete copy of the DNA in preparation for cell division.
- ATP synthesis is involved but is not the main event of this phase.

5. **Analyzing the G2 Phase**:
- The G2 phase is the second gap phase that follows the S phase.
- During G2, the cell continues to grow and prepares for mitosis.
- Importantly, ATP synthesis occurs in this phase as the cell gets ready for division.

6. **Conclusion**:
- Based on the analysis, the correct answer to the question is that ATP is synthesized during the G2 phase of the cell cycle.

### Final Answer:
Antephase refers to the G2 phase, which is the phase in which ATP is synthesized during cell division.

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