Enzyme which is required in AIDS disease to form viral DNA from viral RNA is :-

Answer

### Step-by-Step Solution:

1. **Understanding HIV**: The question pertains to the Human Immunodeficiency Virus (HIV), which is responsible for AIDS (Acquired Immunodeficiency Syndrome). HIV is classified as a retrovirus.

2. **Structure of HIV**: HIV contains two single-stranded RNA molecules and a protein coat known as the capsid. The RNA is essential for the virus's replication process.

3. **Infection Process**: When HIV infects a healthy cell, the capsid remains outside, and the viral RNA enters the host cell.

4. **Host Cell DNA**: The host cell contains DNA, which is necessary for the replication of the virus. However, the incoming viral RNA needs to be converted into DNA to integrate into the host's genetic material.

5. **Role of Reverse Transcriptase**: To convert the viral RNA into DNA, the enzyme required is called **reverse transcriptase**. This enzyme synthesizes DNA from the RNA template.

6. **Integration and Replication**: Once the viral RNA is converted into DNA by reverse transcriptase, this viral DNA can then integrate into the host cell's DNA. This integration allows the virus to replicate and produce new viral particles.

7. **Conclusion**: Therefore, the enzyme required to form viral DNA from viral RNA in the context of AIDS is **reverse transcriptase**.

### Final Answer:
The enzyme required in AIDS disease to form viral DNA from viral RNA is **reverse transcriptase**.

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