Which of the phase is the longest?

Options

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Explanation

To determine which phase is the longest in the context of the cell cycle, we need to analyze the phases involved in mitosis. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the phases of mitosis
Mitosis consists of several phases: prophase, metaphase, anaphase, and telophase. We need to evaluate these phases to find out which one is the longest.

### Step 2: Understand the duration of each phase
- **Prophase**: This is the first phase of mitosis where the chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down. This phase involves significant cellular preparation for division.
- **Metaphase**: In this phase, chromosomes align at the cell's equatorial plane. This phase is relatively short compared to prophase.
- **Anaphase**: This phase involves the separation of sister chromatids and their movement to opposite poles of the cell. It is also a brief phase.
- **Telophase**: This phase marks the end of mitosis where the chromosomes de-condense and the nuclear envelope re-forms. It is shorter than prophase.

### Step 3: Compare the phases
Among these phases, prophase is known to take the longest time because it encompasses the preparation for mitosis, including the condensation of chromatin and the breakdown of the nuclear envelope.

### Step 4: Conclusion
Based on the analysis, the longest phase of mitosis is **prophase**.

### Final Answer
The longest phase of mitosis is **prophase**.

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