Retrovirus contains an enzyme to carry out biochemical activities in host. Name the enzyme.

Options

A. Polymerase
B. Exonuclease
C. Reverse transcriptase
D. Ligase

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Virus**: The question refers to a retrovirus. A well-known example of a retrovirus is the Human Immunodeficiency Virus (HIV), which is responsible for causing Acquired Immunodeficiency Syndrome (AIDS).

2. **Understand the Genetic Material**: Retroviruses, including HIV, have RNA as their genetic material. This is a key characteristic that distinguishes them from other types of viruses.

3. **Enzyme Function**: When a retrovirus infects a host cell, it needs to convert its RNA into DNA in order to integrate into the host's genome and replicate. This conversion is crucial for the virus to carry out its life cycle within the host.

4. **Identify the Enzyme**: The enzyme responsible for converting RNA into DNA in retroviruses is called **reverse transcriptase**. This enzyme allows the retrovirus to reverse the transcription process, which is typically RNA to protein, and instead transcribe its RNA genome into DNA.

5. **Conclusion**: Therefore, the enzyme that retroviruses contain to carry out biochemical activities in the host is **reverse transcriptase**.

**Final Answer**: Reverse transcriptase

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