read the following statements w.r.t tobacco mosaic virus. (a) it is rod like elongated virus which is 3000 A long and 180 A in diameter. (b) it consists of 2130 capsomeres, arranged helically to form the capsid. (c) its genetic material is ds RNA (d) its RNA consists of 6400 nucleotides (e) Nucleotide Capsomeres ratio is 3: 1. select the correct option

Options

A. (a), (b), (c), (d) &(e)
B. (a), (b), (d) & (e)
C. (b), (c), (d) & (e)
D. only(a) & (e)

Answer

To solve the question regarding the statements about the tobacco mosaic virus (TMV), we will analyze each statement one by one to determine their correctness.

### Step-by-Step Solution:

1. **Statement A**: "It is rod-like elongated virus which is 3000 A long and 180 A in diameter."
- **Analysis**: This statement describes the physical dimensions of the TMV accurately. TMV is indeed rod-shaped and its measurements are approximately 3000 Å (angstroms) in length and 180 Å in diameter.
- **Conclusion**: **Correct**

2. **Statement B**: "It consists of 2130 capsomeres, arranged helically to form the capsid."
- **Analysis**: TMV is known to have a helical structure, and it is composed of approximately 2130 protein subunits called capsomeres that form its capsid.
- **Conclusion**: **Correct**

3. **Statement C**: "Its genetic material is ds RNA."
- **Analysis**: This statement is incorrect. TMV contains single-stranded RNA (ssRNA), not double-stranded RNA (dsRNA).
- **Conclusion**: **Incorrect**

4. **Statement D**: "Its RNA consists of 6400 nucleotides."
- **Analysis**: This statement is accurate. The RNA genome of TMV is indeed around 6400 nucleotides long.
- **Conclusion**: **Correct**

5. **Statement E**: "Nucleotide Capsomeres ratio is 3:1."
- **Analysis**: If we consider the number of nucleotides (6400) and the number of capsomeres (2130), the ratio can be calculated as follows:
- Ratio = Number of Nucleotides / Number of Capsomeres = 6400 / 2130 ≈ 3.0
- **Conclusion**: **Correct**

### Final Conclusion:
The correct statements are A, B, D, and E. Thus, the correct option is that statements A, B, D, and E are correct.