Which one of the following statement is incorrect for interphase stage ?

Options

A. Period of great metabolic activity
B. Also called preparatory Phase
C. Absence of replication of DNA
D. It covers over 95% of the total duration of cell cycle

Answer

To determine which statement is incorrect regarding the interphase stage of the cell cycle, let’s analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Interphase**:
- Interphase is the stage of the cell cycle where the cell prepares for division. It consists of three phases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
- This stage is crucial for cell growth, DNA replication, and preparation for mitosis.

2. **Evaluating the Statements**:
- **Statement 1**: "Period of great metabolic activity also called preparatory phase."
- This statement is **correct**. Interphase is indeed characterized by high metabolic activity as the cell prepares for division.

- **Statement 2**: "Absence of replication of DNA."
- This statement is **incorrect**. DNA replication occurs during the S phase of interphase. Therefore, this statement does not accurately describe interphase.

- **Statement 3**: "It covers over 95% of total duration of cell cycle."
- This statement is **correct**. Interphase typically occupies a significant portion of the cell cycle, often more than 90%, which can be interpreted as over 95%.

3. **Conclusion**:
- The incorrect statement about interphase is: **"Absence of replication of DNA."**

### Final Answer:
The incorrect statement for the interphase stage is: **"Absence of replication of DNA."**

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