What are retroviruses?

Explanation

**Step-by-Step Solution:**

1. **Definition of Retroviruses**: Retroviruses are a specific type of virus that primarily contain RNA as their genetic material, unlike many other viruses that may contain DNA.

**Hint**: Remember that retroviruses are distinct because they utilize RNA instead of DNA.

2. **Presence of Reverse Transcriptase**: A key characteristic of retroviruses is the presence of an enzyme called reverse transcriptase. This enzyme is crucial for the retrovirus's replication process.

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