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Cryptogram of TMV is (a) R/1, 1/8, S/S,...

Cryptogram of TMV is
(a) R/1, 1/8, S/S, S/Af
(b) R/2, 1/5, E/P, O/S
(c) R/1, 2/5, E/E, S/O
(d) R/1, 2/7, E/E, S/O

A

R/1, 1/8, S/S, S/Af

B

R/2, 1/5, E/P, O/S

C

R/1, 2/5, E/E, S/O

D

R/1, 2/7, E/E, S/O

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct cryptogram for the Tobacco Mosaic Virus (TMV), we need to analyze the options provided based on the characteristics of TMV. ### Step-by-Step Solution: 1. **Understanding TMV**: - TMV stands for Tobacco Mosaic Virus, which is a plant virus. - It contains single-stranded RNA as its genetic material. 2. **Cryptogram Structure**: - The cryptogram is divided into four parts: - The first part indicates the type of nucleic acid. - The second part indicates the molecular weight. - The third part indicates the shape of the virus. - The fourth part indicates the mode of transmission. 3. **Analyzing the First Part (Nucleic Acid)**: - Since TMV has single-stranded RNA, the first part of the cryptogram should be "R" for RNA. - Additionally, TMV has one RNA molecule, so it should be "R/1". - We can eliminate options that do not start with "R/1". 4. **Analyzing the Second Part (Molecular Weight)**: - The molecular weight of TMV is approximately 2.5 x 10^6 daltons, which corresponds to "2/5" in the cryptogram. - Therefore, we need to look for "1/5" or "2/5" in the options. - Since we already established that the first part must be "R/1", we can eliminate any options that do not have "2/5". 5. **Analyzing the Third Part (Shape)**: - TMV has an elongated rod shape, which is represented as "E/E" in the cryptogram. - We need to check for options that have "E/E". 6. **Analyzing the Fourth Part (Mode of Transmission)**: - TMV spreads without any vector, which is represented as "S/O" in the cryptogram. - We need to confirm that the option includes "S/O". 7. **Final Evaluation**: - After analyzing all parts of the cryptogram, we can summarize: - The correct cryptogram for TMV should be "R/1, 2/5, E/E, S/O". - Looking at the options: - (a) R/1, 1/8, S/S, S/Af - (b) R/2, 1/5, E/P, O/S - (c) R/1, 2/5, E/E, S/O - (d) R/1, 2/7, E/E, S/O - The only option that matches our findings is **(c) R/1, 2/5, E/E, S/O**. ### Conclusion: The correct cryptogram of TMV is **(c) R/1, 2/5, E/E, S/O**.
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