Explain interphase and how much proportion of cell cycle it takes?

Answer

### Step-by-Step Solution:

1. **Definition of Interphase**:
- Interphase is the phase of the cell cycle in which the cell prepares for division. It is a crucial period where the cell grows, duplicates its DNA, and prepares for mitosis.

2. **Proportion of the Cell Cycle**:
- Interphase takes up approximately 90% of the total cell cycle duration. This indicates that the majority of a cell's life is spent in this preparatory phase rather than in the actual division.

3. **Phases of Interphase**:
- Interphase consists of three distinct phases:
- **G1 Phase (Gap 1)**: This is the first phase where the cell grows in size, produces RNA, and synthesizes proteins. It is a period of active growth and metabolic activity.
- **S Phase (Synthesis)**: During this phase, the cell replicates its DNA, ensuring that each daughter cell will receive an identical set of chromosomes.
- **G2 Phase (Gap 2)**: In this final phase of interphase, the cell continues to grow and prepares for mitosis. It checks the duplicated DNA for any errors and makes necessary repairs.

4. **Subsequent Processes**:
- After interphase, the cell enters mitosis, which consists of four main stages: prophase, metaphase, anaphase, and telophase. These stages are where the actual division of the cell occurs.