Correct Option (b)
Reason : Tobacco Mosaic Virus (TMV) is elongated, rod shaped, most thoroughly studied plant virus, with 95% protein and 5% RNA by weight. RNA is genomic, i.e. genetic material which is single stranded, linear, helically coiled, 5 mμ in length with 6500 nucleotides long.
Correct Option (b) Reason : Tobacco Mosaic Virus (TMV) is elongated, rod shaped, most thoroughly studied plant virus, with 95% protein and 5% RNA by weight. RNA is genomic, i.e. genetic material which is single stranded, linear, helically coiled, 5 mμ in length with 6500 nucleotides long.