In retroviruses, genetic material is

Options

A. RNA
B. DNA
C. DNA~ RNA
D. genes on nucleo protein complexes

Answer

### Step-by-Step Solution:

1. **Understanding Viruses**:
- Viruses are small infectious agents that cannot reproduce independently. They require a host cell to multiply.
- They contain genetic material, which can either be RNA or DNA.

2. **Identifying Retroviruses**:
- Retroviruses are a specific type of virus characterized by their genetic material.
- They are known to have single-stranded RNA as their genetic material.

3. **Mechanism of Retroviruses**:
- Retroviruses utilize an enzyme called reverse transcriptase to convert their RNA into DNA.
- This newly formed DNA is then integrated into the host cell's genome.

4. **Impact on Host Cells**:
- Once integrated, the host cell treats the viral DNA as part of its own genetic material.
- The host cell then transcribes and translates the viral genes, producing proteins necessary for assembling new virus copies.

5. **Conclusion**:
- Therefore, the genetic material of retroviruses is RNA.
- A well-known example of a retrovirus is the Human Immunodeficiency Virus (HIV), which has RNA as its genetic material.

### Final Answer:
In retroviruses, the genetic material is RNA.

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