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Kuru disease in humans is caused by
(a)An infectious protein particle
(b)A virus, containing ssRNA
(c)An infectious ssRNA molecule without protein coat
(d)A virus containing dsDNA.

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Important Questions on Biological Classification
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Which of the following symptoms is not related with viral infection in plants?

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Viruses do not have any position in Whittaker’s system because of

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Read the following statements w.r.t. viruses and select the correct option:
(a) No virus contains both DNA and RNA.
(b) An inert virus, outside its specific host, is called virion.

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Viruses that infect plants have usually:

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Match the incorrect option w.r.t. genetic material:

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Which of the following statements is incorrect for viruses?

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Lichens are symbiotic association between two components which are, respectively
