The amount of DNA per cell remains same during

Options

A. `S, G_(2)` and metaphase
B. `G_(1), G_(2)`, M phase
C. Anaphase, Telophase, `G_(1)` phase
D. (1) and (3)

Answer

To answer the question "The amount of DNA per cell remains the same during," we need to analyze the different phases of the cell cycle and understand when the DNA content remains constant. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understand the Cell Cycle**: The cell cycle consists of interphase and mitotic phase (M phase). Interphase is further divided into G1, S, and G2 phases.

2. **Identify the Phases**:
- **G1 Phase**: The cell grows and prepares for DNA replication. The amount of DNA remains constant during this phase.
- **S Phase**: DNA replication occurs, and the amount of DNA doubles. Therefore, the DNA content does not remain the same.
- **G2 Phase**: The cell continues to grow and prepares for mitosis. The amount of DNA remains constant during this phase as well.
- **M Phase (Mitosis)**: This phase includes prophase, metaphase, anaphase, and telophase. During metaphase, chromosomes align, but the DNA content is not constant since it will be divided in anaphase and telophase.

3. **Conclusion**: The amount of DNA per cell remains the same during the G1 phase, G2 phase, and the M phase (excluding the S phase). Therefore, the correct answer is G1, G2, and M phase.

### Final Answer:
The amount of DNA per cell remains the same during **G1 phase, G2 phase, and M phase**.

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