A) Polio virus
B) Tobacco mosaic virus
C) Measles virus
D) Retrovirus
Correct Answer: B
Solution :
In TMV RNA is single stranded (ss) helically coiled structure containing about 2130 capsomeres, a basic subunit of capsid (an outer covering of protein that protects the genetic material of a virus). There are about 16 capsomeres present in each helical turn.
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