If the initial amount of DNA is 8, C then after S phase the amount of DNA would be

Options

A. 4 C
B. 8 C
C. 64 C
D. 16 C

Answer

To solve the question, we need to understand the process of DNA replication during the S phase of the cell cycle.

### Step-by-Step Solution:

1. **Identify the Initial Amount of DNA**:
The question states that the initial amount of DNA is 8C. Here, "C" represents the amount of DNA in a haploid set.

2. **Understand the S Phase**:
The S phase (Synthesis phase) of the cell cycle is when DNA replication occurs. During this phase, each chromosome is replicated to produce two sister chromatids.

3. **Calculate the Amount of DNA After S Phase**:
Since the DNA is replicated during the S phase, the amount of DNA will double. Therefore, if the initial amount is 8C, after replication, it will be:
\[ \text{Amount of DNA after S phase} = 2 \times \text{Initial amount} = 2 \times 8C = 16C \]

4. **Conclusion**:
Thus, after the S phase, the amount of DNA would be 16C.

### Final Answer:
The amount of DNA after the S phase is **16C**.

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