DNA polymerase is the another name of

Options

A. DNA dependent DNA polymerase
B. DNA dependent RNA polymerase
C. RNA dependent RNA polymerase
D. RNA dependent DNA polymerase

Answer

### Step-by-Step Solution:

1. **Understanding DNA Polymerase**:
- DNA polymerase is an enzyme that plays a crucial role in the process of DNA replication. It synthesizes new strands of DNA by adding nucleotides to an existing DNA strand.

2. **Function of DNA Polymerase**:
- Its primary function is to facilitate the polymerization of DNA. This means it helps in extending the DNA chain, which is essential for DNA replication.

3. **Process of DNA Replication**:
- During DNA replication, the double helix structure of DNA unwinds. This unwinding is assisted by enzymes such as helicase.
- Once the strands are separated, an RNA primer is laid down on the template strand to provide a starting point for DNA synthesis.

4. **Role of RNA Primer**:
- The RNA primer is crucial because DNA polymerase cannot initiate the synthesis of a new DNA strand; it can only add nucleotides to an existing strand.

5. **Identifying the Correct Name for DNA Polymerase**:
- The question asks for another name for DNA polymerase. The correct term is "DNA-dependent DNA polymerase." This indicates that the enzyme synthesizes DNA using a DNA template.

6. **Eliminating Incorrect Options**:
- Other options such as DNA dependent RNA polymerase, RNA dependent RNA polymerase, and RNA dependent DNA polymerase do not correctly describe the function of DNA polymerase.
- DNA dependent RNA polymerase is involved in transcription (making RNA from DNA), while RNA dependent RNA polymerase is involved in synthesizing RNA from RNA templates.

7. **Conclusion**:
- Therefore, the correct answer is that DNA polymerase is another name for "DNA-dependent DNA polymerase."