The enzyme DNA polymerase , observed to be active in the process of DNA replication, is involved in the synthesis of

Options

A. a polypeptide using DNA as a template
B. a strand of DNA using a polypeptide as a template
C. a strand of DNA using DNA as template
D. a strand of DNA using RNA as a template

Answer

To solve the question regarding the role of the enzyme DNA polymerase in DNA replication, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of DNA Polymerase**:
- DNA polymerase is an enzyme that plays a crucial role in DNA replication. Its primary function is to synthesize new strands of DNA.

2. **Identify the Template Used by DNA Polymerase**:
- DNA polymerase synthesizes new DNA strands by using an existing strand of DNA as a template. This means it reads the sequence of the template strand to create a complementary strand.

3. **Analyze the Options Given**:
- **Option A**: "A polypeptide using DNA as a template" - This is incorrect because DNA polymerase does not synthesize polypeptides; that process is carried out by ribosomes during translation.
- **Option B**: "A strand of DNA using polypeptide as a template" - This is incorrect because polypeptides cannot serve as templates for DNA synthesis.
- **Option C**: "A strand of DNA using DNA as a template" - This is correct because DNA polymerase synthesizes a new DNA strand by using an existing DNA strand as a template.
- **Option D**: "A strand of DNA using RNA as a template" - This is incorrect in the context of DNA polymerase; this process involves reverse transcriptase, not DNA polymerase.

4. **Select the Correct Answer**:
- Based on the analysis, the correct answer is **Option C**: "A strand of DNA using DNA as a template".

### Final Answer:
The enzyme DNA polymerase, observed to be active in the process of DNA replication, is involved in the synthesis of **a strand of DNA using DNA as a template**.

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