Reverse transcriptase is also called

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding Reverse Transcriptase**:
- Reverse transcriptase is an enzyme that catalyzes the synthesis of DNA from an RNA template. This process is known as reverse transcription.

2. **Identifying the Function of Reverse Transcriptase**:
- The primary role of reverse transcriptase is to convert RNA into DNA, which is the opposite of the typical transcription process where DNA is converted into RNA.

3. **Analyzing the Options**:
- Option 1: RNA dependent DNA polymerase - This option suggests that the enzyme uses RNA as a template to synthesize DNA.
- Option 2: DNA dependent RNA polymerase - This enzyme synthesizes RNA from a DNA template, which is not the function of reverse transcriptase.
- Option 3: DNA dependent DNA polymerase - This enzyme synthesizes DNA from a DNA template, which is also not the function of reverse transcriptase.
- Option 4: RNA dependent RNA polymerase - This enzyme synthesizes RNA from an RNA template, which again does not describe reverse transcriptase.

4. **Selecting the Correct Answer**:
- Since reverse transcriptase synthesizes DNA from an RNA template, the correct term for it is "RNA dependent DNA polymerase". Therefore, the correct answer is option 1.

### Final Answer:
Reverse transcriptase is also called **RNA dependent DNA polymerase**.

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