Which one is correctly matched ?

Options

A. Oncogenes-Ageing
B. Initiation factors-Amino acid activation
C. Replication fork-m RNA
D. AIDS virus-Reverse transcription

Answer

To determine which option is correctly matched, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Analyze the first option: Oncogenes and Aging**
- Oncogenes are genes that have the potential to cause cancer. They are involved in cell growth and division.
- Aging is a biological process that involves gradual changes over time, but oncogenes do not play a direct role in aging.
- **Conclusion:** This option is incorrect.

2. **Analyze the second option: Initiation Factors and Amino Acid Activation**
- Initiation factors are proteins that help in the initiation of translation, the process where ribosomes synthesize proteins from mRNA.
- Amino acid activation refers to the process where amino acids are attached to their corresponding tRNA molecules, a step that occurs before translation.
- Initiation factors do not directly participate in the activation of amino acids.
- **Conclusion:** This option is incorrect.

3. **Analyze the third option: Replication Fork and mRNA**
- The replication fork is the area where DNA replication occurs, where the double helix unwinds and new strands are synthesized.
- mRNA (messenger RNA) is synthesized during transcription, which is a different process from DNA replication.
- Therefore, replication forks are not related to mRNA synthesis.
- **Conclusion:** This option is incorrect.

4. **Analyze the fourth option: AIDS Virus and Reverse Transcription**
- The AIDS virus, known as HIV (Human Immunodeficiency Virus), is an RNA virus.
- HIV contains an enzyme called reverse transcriptase, which converts its RNA genome into DNA after entering a host cell.
- This process is known as reverse transcription and is crucial for the virus's replication.
- **Conclusion:** This option is correct.

### Final Answer:
The correctly matched option is **AIDS virus and reverse transcription**.

---