TMV has a size of

Options

A. `50 nm xx 10 nm`
B. `100 nm xx 20 nm`
C. `300nm xx 18 nm`
D. `500nm xx 24 nm`

Answer

To determine the size of the Tobacco Mosaic Virus (TMV), we can follow these steps:

1. **Identify TMV**: TMV stands for Tobacco Mosaic Virus, which is a well-known plant virus that causes tobacco mosaic disease in tobacco plants.

2. **Understand its Structure**: TMV is a nucleoprotein particle, meaning it consists of nucleic acid (RNA) surrounded by a protein coat.

3. **Find the Size of TMV**: The size of TMV is specifically characterized by its length and diameter. It is known to be approximately 300 nanometers in length and about 18 to 19 nanometers in diameter.

4. **Evaluate the Options**: Given the options:
- Option 1: 50 nm x 10 nm
- Option 2: 100 nm x 20 nm
- Option 3: 300 nm x 18 nm
- Option 4: 500 nm x 24 nm
The correct dimensions of TMV match with Option 3.

5. **Conclusion**: Therefore, the size of TMV is 300 nanometers in length and approximately 18 nanometers in diameter, making Option 3 the correct answer.