Cell would normally proceed to mitosis without interruption

Options

A. `G_(1)` Phase
B. S-Phase
C. `G_(2)` Phase
D. M-Phase

Answer

To solve the question "Cell would normally proceed to mitosis without interruption," we need to analyze the phases of the cell cycle and identify which phase allows the cell to continue directly to mitosis.

### Step-by-Step Solution:

1. **Understand the Cell Cycle Phases**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions and checkpoints.

2. **Identify the Phases**:
- **G1 Phase**: The cell grows and prepares for DNA replication. This phase includes a checkpoint where the cell can either continue to the S phase or enter a resting state (G0 phase).
- **S Phase**: This is where DNA synthesis occurs. The chromosomes are replicated, preparing the cell for mitosis.
- **G2 Phase**: The cell continues to grow and prepares for mitosis. It also has a checkpoint to ensure everything is ready for division.
- **M Phase**: This is the phase where mitosis occurs, leading to cell division.

3. **Determine the Correct Phase for Uninterrupted Progression**:
- The question asks which phase allows the cell to proceed to mitosis without interruption.
- After the G1 phase, if the cell successfully passes the checkpoint, it enters the S phase where DNA replication occurs. Once the S phase is completed, the cell moves into the G2 phase and then to the M phase (mitosis) without any interruptions.

4. **Conclusion**: Since the S phase is crucial for DNA replication and allows the cell to continue to mitosis, the correct answer is **Option 2: S Phase**.

### Final Answer:
**Option 2: S Phase**

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