After entering T-cell, HIV first forms

Options

A. mRNA
B. Single stranded DNA
C. Double stranded DNA
D. Double stranded RNA

Answer

To answer the question "After entering T-cell, HIV first forms," we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding HIV Entry**:
- HIV (Human Immunodeficiency Virus) enters the T-helper cell by attaching to its surface receptors. This is the initial step in the infection process.

2. **HIV Genetic Material**:
- HIV is an RNA virus, meaning its genetic material is in the form of RNA.

3. **Reverse Transcription**:
- Once inside the T-cell, the viral RNA needs to be converted into DNA to integrate into the host's genome. This conversion is performed by an enzyme called reverse transcriptase.

4. **Formation of Single-Stranded DNA**:
- The first product of reverse transcription is single-stranded DNA (ssDNA). The viral RNA is reverse transcribed into ssDNA.

5. **Conversion to Double-Stranded DNA**:
- The single-stranded DNA can then be converted into double-stranded DNA (dsDNA), but this occurs after the initial formation of ssDNA.

6. **Integration into Host Genome**:
- The double-stranded DNA is then integrated into the host's genome, allowing the virus to replicate using the host's cellular machinery.

### Conclusion:
- Therefore, after entering the T-cell, the first form that HIV takes is **single-stranded DNA (ssDNA)**.

### Final Answer:
- The correct answer is **single-stranded DNA**.

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