What is the category of virus that carries reverse transcriptase? What is the purpose of this enzyme?

Explanation

### Step-by-Step Solution:

1. **Identify the Category of Virus**:
The category of virus that carries reverse transcriptase is known as **Retroviruses**. These viruses have RNA as their genetic material.

2. **Understanding Reverse Transcriptase**:
Reverse transcriptase is an enzyme that facilitates the process of **reverse transcription**. This is the process where RNA is converted into DNA.

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