DNA duplication takes place during `:`

Options

A. Early prophase
B. Late prophase
C. Telophase
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Cell Cycle:**
The cell cycle consists of several phases that a cell goes through to divide and replicate. These phases include G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis).

2. **Identifying the Phases:**
- **G1 Phase:** The cell grows, synthesizes proteins, and duplicates organelles.
- **S Phase:** This is the phase where DNA replication occurs. Each chromosome is duplicated to form sister chromatids.
- **G2 Phase:** The cell continues to grow and prepares for mitosis.
- **M Phase:** This is where the cell divides, which includes prophase, metaphase, anaphase, and telophase.

3. **Focusing on DNA Duplication:**
From the above phases, we can see that DNA duplication specifically occurs during the S phase of the cell cycle.

4. **Evaluating the Options:**
- **Early Prophase:** Incorrect, as this is part of the M phase where the cell is preparing to divide.
- **Late Prophase:** Incorrect, as this is also part of the M phase.
- **Telophase:** Incorrect, as this is the final stage of mitosis.
- **None of the Above:** Correct, since DNA duplication does not occur in any of the listed options.

5. **Conclusion:**
Therefore, the correct answer to the question "DNA duplication takes place during:" is **None of the above**.

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