Which of the following is wrongly match?

T.O. Diener- Viroids are found to be free DNA

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W.M. Stanley- Crystallization of the tobacco mosaic virus

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M.W. Beijerinck- Contagium vivum fluidum

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D.J. Ivanowski- Microbes smaller than bacteria cause mosaic disease of tobacco

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L. Pasteur- Virus means venom (or poisonous fluid)

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Solution

The correct option is A T.O. Diener- Viroids are found to be free DNA
Theodor Otto Diener is the Swiss American plant pathologist who discovered the viroid in 1971. He observed that the causative agent of the potato spindle tuber disease is not a virus but a small agent which consists of a short strand of single-stranded RNA without a protein capsid. A viroid is eighty times smaller than the smallest viruses. He proposed the name to it.
So, the correct answer is 'T.O. Diener - Viroids are found to be free DNA'.

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