In the host cell, RNA of the HIV replicates to form viral DNA by the action of

Options

A. Transcriptase
B. Protease
C. Integrase
D. Reverse transcriptase

Answer

To answer the question, "In the host cell, RNA of the HIV replicates to form viral DNA by the action of," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding HIV**:
- HIV stands for Human Immunodeficiency Virus, which is responsible for causing AIDS (Acquired Immunodeficiency Syndrome). It weakens the immune system, making the body susceptible to infections.

2. **Genetic Material of HIV**:
- The genetic material of HIV is RNA (Ribonucleic Acid). Unlike most organisms that use DNA (Deoxyribonucleic Acid) as their genetic material, HIV uses RNA.

3. **Process of Replication**:
- When HIV enters a host cell, it injects its RNA into the cell. This is where the replication process begins.

4. **Reverse Transcription**:
- In HIV, the RNA must be converted into DNA. This process is known as reverse transcription, which is the opposite of the normal transcription process where DNA is converted into RNA.

5. **Enzyme Involved**:
- The enzyme responsible for converting the viral RNA into DNA is called reverse transcriptase. This enzyme synthesizes a complementary DNA strand from the viral RNA template.

6. **Conclusion**:
- Therefore, the correct answer to the question is that the RNA of the HIV replicates to form viral DNA by the action of reverse transcriptase.

### Final Answer:
The RNA of the HIV replicates to form viral DNA by the action of **reverse transcriptase**.

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