Which of the following shows coiled RNA strand and capsomeres

Options

A. Polio virus
B. Tobacco mosaic virus
C. Measles virus
D. Retrovirus

Answer

To solve the question "Which of the following shows coiled RNA strand and capsomeres?", we can follow these steps:

### Step 1: Understand the Components
First, we need to identify what is meant by "coiled RNA strand" and "capsomeres".
- A coiled RNA strand refers to the RNA that is arranged in a helical or coiled structure.
- Capsomeres are the protein subunits that make up the capsid, which is the protective protein coat surrounding the viral RNA.

### Step 2: Analyze the Options
Next, we need to analyze the provided options (though they are not listed here, we will assume common viruses):
1. **Poliovirus**: This virus has an RNA genome and a protein capsid, but it is not known for having a coiled structure.
2. **Tobacco Mosaic Virus (TMV)**: This virus is known for its coiled RNA strand and is composed of many capsomeres forming its helical structure.
3. **Measles Virus**: This virus has a single-stranded RNA but is enveloped and does not have a coiled structure.
4. **Retrovirus**: Retroviruses have RNA as genetic material, but they do not typically exhibit a coiled RNA strand structure like TMV.

### Step 3: Identify the Correct Answer
From the analysis, the Tobacco Mosaic Virus is the only option that shows a coiled RNA strand and capsomeres. Therefore, the correct answer is:
**Tobacco Mosaic Virus (Option 2)**.

### Step 4: Conclusion
In conclusion, the virus that shows a coiled RNA strand and capsomeres is the Tobacco Mosaic Virus.

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