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B
eukaryotes
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C
Tobacco Mosaic Virus (TMV)
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D
E. coil.
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Solution
The correct option is B Tobacco Mosaic Virus (TMV) Most of the plant viruses have RNA as their hereditary material and TMV is a small virus composed of a single molecule of spring-like RNA encapsulated in a cylindrical protein coat. Tobacco mosaic virus has a rod-like appearance. Its capsid is made from 2130 molecules of coat protein and one molecule of genomic single strand RNA, 6400 bases long.
So, the correct answer is 'Tobacco Mosaic Virus (TMV)'.