M-Phase in humans lasts

Options

A. 90% of the total cell division duration
B. 60% of the total cell division duration
C. 96% of the total cell division duration
D. lt 5 % of the total cell division duration

Answer

To determine how long the M-phase lasts in humans, we can break down the information provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**:
- The cell cycle consists of a series of events that prepare a cell for division and ultimately lead to its division. It is divided into two main phases: Interphase and M-phase (Mitosis).

**Hint**: Remember that the cell cycle is crucial for cell division and consists of distinct phases.

2. **Phases of the Cell Cycle**:
- Interphase is the phase where the cell prepares for division. It is further divided into three stages: G1 phase (cell growth and protein synthesis), S phase (DNA replication), and G2 phase (further growth and preparation for mitosis).

**Hint**: Focus on the activities that occur during Interphase to understand its significance.

3. **Duration of the Cell Cycle**:
- The average duration of the entire cell cycle is approximately 24 hours. During this time, Interphase occupies a significant portion.

**Hint**: Keep in mind the total duration of the cell cycle when considering the percentage of time each phase takes.

4. **Duration of M-phase**:
- The M-phase, which includes mitosis and meiosis, is the actual division phase of the cell cycle. According to the information, M-phase lasts for about 5% of the total cell division duration.

**Hint**: Compare the duration of M-phase with Interphase to see how much time is spent on actual cell division.

5. **Conclusion**:
- Based on the provided information, the M-phase in humans lasts for 5% of the total cell division duration.

**Final Answer**: The M-phase in humans lasts for **5% of the total cell division duration** (Option D).