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Question
Which of the following shows coiled RNA strand and capsomeres?
Which of the following shows coiled RNA strand and capsomeres?
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Solution
The correct option is C Tobacco mosaic virus
Tobacco mosaic virus is a positive sense coiled single-stranded RNA virus that infects tobacco and other members of the family Solanaceae. Tobacco mosaic virus has a rod-like an appearance. Its capsid is made from 2130 capsomeres and one molecule of genomic single strand RNA which is 6400 bases long. The coat protein self-assembles into the rod-like helical structure around the RNA which forms a hairpin loop structure. Inside the core helix, coiled RNA molecule is present. Coiled RNA is absent in measles, retrovirus and poliovirus. So, the correct answer is 'Tobacco mosaic virus'.
Tobacco mosaic virus is a positive sense coiled single-stranded RNA virus that infects tobacco and other members of the family Solanaceae. Tobacco mosaic virus has a rod-like an appearance. Its capsid is made from 2130 capsomeres and one molecule of genomic single strand RNA which is 6400 bases long. The coat protein self-assembles into the rod-like helical structure around the RNA which forms a hairpin loop structure. Inside the core helix, coiled RNA molecule is present. Coiled RNA is absent in measles, retrovirus and poliovirus.
So, the correct answer is 'Tobacco mosaic virus'.
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