Gap between division phase and start of DNA-replication is called :-

Options

A. `G_(1)-"phase"`
B. `G_(2)-"phase"`
C. M - phase
D. Interkinesis

Answer

To answer the question regarding the gap between the division phase and the start of DNA replication, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cell Cycle Phases**: The cell cycle consists of several phases, including G1, S, G2, and M phases. Each phase has a specific role in the cell's preparation for division.

2. **Identifying the Phases**:
- **G1 Phase**: This is the first gap phase after cell division (M phase) where the cell grows and synthesizes proteins necessary for DNA replication.
- **S Phase**: This is the phase where DNA replication occurs.
- **G2 Phase**: This is the second gap phase after DNA replication, where the cell prepares for mitosis.
- **M Phase**: This is the mitotic phase where the cell divides.

3. **Analyzing the Question**: The question asks for the gap between the division phase (M phase) and the start of DNA replication (S phase).

4. **Identifying the Correct Phase**:
- The gap between the M phase and the S phase is the G1 phase.
- During the G1 phase, the cell grows and prepares for DNA replication, which occurs in the S phase.

5. **Conclusion**: Therefore, the gap between the division phase (M phase) and the start of DNA replication (S phase) is called the **G1 phase**.

### Final Answer:
The gap between the division phase and the start of DNA replication is called **G1 phase** (Option A).