Which of the following shows coiled RNA strand and capsomeres

Options

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

Answer

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

### Step 1: Identify the Virus
The question is asking about a specific virus that exhibits a coiled RNA strand and capsomeres. The key terms here are "coiled RNA strand" and "capsomeres."

### Step 2: Understand the Structure of Viruses
Viruses can have different structures. Some have DNA, while others have RNA as their genetic material. Additionally, viruses are composed of a protein coat called a capsid, which is made up of smaller units known as capsomeres.

### Step 3: Focus on Tobacco Mosaic Virus (TMV)
Among the viruses, the Tobacco Mosaic Virus (TMV) is known for its distinct structure. TMV is a single-stranded RNA virus that has a coiled or helical shape. The RNA is tightly packed within the capsid, which is formed by protein subunits called capsomeres.

### Step 4: Confirm the Characteristics
The TMV exhibits the following characteristics:
- It has a coiled RNA strand.
- It has a capsid made up of capsomeres.

### Step 5: Conclusion
Based on the characteristics of TMV, we can conclude that the correct answer to the question is the Tobacco Mosaic Virus.

### Final Answer:
The correct answer is **Tobacco Mosaic Virus (TMV)**.

---