A virus containing ssRNA act as a template for DNA synthesis is called as

Options

A. Polio Virus
B. Retrovirus
C. Adeno Virus
D. Pox virus

Answer

To solve the question, "A virus containing ssRNA that acts as a template for DNA synthesis is called as," we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for a specific type of virus that contains single-stranded RNA (ssRNA) and can use that RNA as a template to synthesize DNA.

2. **Analyzing the Options**:
- **Poliovirus**: This virus contains ssRNA, but it does not synthesize DNA from its RNA. Instead, it replicates its RNA.
- **Retrovirus**: This type of virus contains ssRNA and utilizes an enzyme called reverse transcriptase to convert its RNA into DNA. This DNA can then integrate into the host's genome.
- **Adenovirus**: This virus contains double-stranded DNA, not RNA, and does not fit the criteria of the question.
- **Poxvirus**: This virus also contains double-stranded DNA and does not use RNA as a template for DNA synthesis.

3. **Identifying the Correct Answer**: Given the analysis of the options, the only virus that fits the description of containing ssRNA and using it as a template for DNA synthesis is the **Retrovirus**.

4. **Conclusion**: Therefore, the correct answer to the question is **Retrovirus**.

### Final Answer:
The virus containing ssRNA that acts as a template for DNA synthesis is called a **Retrovirus**.

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