If the initial amount of DNA is denoted by 2 C then the amount of DNA present after S phase will be

Options

A. 4 C
B. 8 C
C. 2 C
D. 5 C

Answer

To solve the question regarding the amount of DNA present after the S phase when the initial amount of DNA is denoted by 2C, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Initial Amount of DNA**:
- The problem states that the initial amount of DNA is 2C. This means that before the S phase, the cell has a certain amount of DNA represented as 2C.

2. **Identifying the S Phase**:
- The S phase, or synthesis phase, is a part of the cell cycle where DNA replication occurs. This phase is crucial for preparing the cell for division.

3. **DNA Replication During the S Phase**:
- During the S phase, the DNA is replicated. This means that each strand of DNA is duplicated, effectively doubling the amount of DNA in the cell.

4. **Calculating the Amount of DNA After S Phase**:
- Since the initial amount of DNA is 2C and it doubles during the S phase, we calculate the amount of DNA after the S phase as follows:
- Amount of DNA after S phase = Initial amount of DNA × 2
- Amount of DNA after S phase = 2C × 2 = 4C

5. **Conclusion**:
- Therefore, the amount of DNA present after the S phase will be 4C.

### Final Answer:
The amount of DNA present after the S phase will be **4C**.

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