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Question

Tobacco mosaic virus (TMV) genes are

A
single stranded RNA
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B
double stranded DNA
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C
proteinaceous
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D
double stranded RNA.
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Solution

The correct option is A single stranded RNA
Tobacco Mosaic Virus is a ribovirus and contains single stranded RNA. It was proved by the experiments of Frankel Conart that RNA is the genetic material in this virus. It does not contain any DNA and is composed of 6% RNA surrounded by a hollow cylinder of portion subunits.

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