Genetic material in viruses like retro viruses

Options

A. DNA
B. RNA
C. Both
D. None

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the genetic material found in retroviruses. Retroviruses are a specific type of virus.

2. **Identifying the Genetic Material**: Retroviruses are characterized by their genetic material, which is a single-stranded RNA (ssRNA). This is different from other viruses that may contain DNA.

3. **Role of Reverse Transcriptase**: Retroviruses also contain an enzyme called reverse transcriptase. This enzyme allows the retrovirus to convert its RNA into DNA (cDNA) once it infects a host cell.

4. **Central Dogma of Molecular Biology**: After the conversion of RNA to DNA, the normal processes of the central dogma (DNA to RNA to protein) can occur. This means that the viral RNA is first reverse transcribed into DNA, which can then integrate into the host's genome.

5. **Example of Retroviruses**: A well-known example of a retrovirus is the Human Immunodeficiency Virus (HIV), which is responsible for causing Acquired Immunodeficiency Syndrome (AIDS).

6. **Conclusion**: The correct answer to the question is that the genetic material in retroviruses is RNA. Therefore, the answer is "RNA".

### Final Answer:
The genetic material in retroviruses is RNA.

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