M-phase of cell cycle consist of :-

Options

A. `G_(1), S" and "G_(2)` phase
B. Prophase, Metaphase, Anaphase, Telophase
C. Interphase, Prophase, Metaphase, Anaphase, Telophase
D. Only prophase

Answer

**Step-by-Step Solution:**

1. **Understanding the M-phase**: The M-phase, also known as the mitotic phase, is a crucial part of the cell cycle where cell division occurs. It is characterized by the process of karyokinesis (nuclear division) and cytokinesis (cytoplasmic division).

2. **Identifying the components of M-phase**: The M-phase consists of several distinct stages that occur sequentially. These stages are:
- **Prophase**: The chromosomes condense and become visible, the nuclear envelope breaks down, and the mitotic spindle begins to form.
- **Metaphase**: The chromosomes align at the cell's equatorial plane, and spindle fibers attach to the centromeres of the chromosomes.
- **Anaphase**: The sister chromatids are pulled apart toward opposite poles of the cell.
- **Telophase**: The chromosomes reach the poles, the nuclear envelope re-forms around each set of chromosomes, and the chromosomes begin to de-condense.

3. **Conclusion**: Based on the above stages, the M-phase of the cell cycle consists of prophase, metaphase, anaphase, and telophase. Therefore, the correct answer is that the M-phase consists of these four stages.

4. **Final Answer**: The M-phase of the cell cycle consists of prophase, metaphase, anaphase, and telophase.

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