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Human Health And Disease

Question
CBSEENBI12002585
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Infectionus proteins are present in

  • geminiviruses

  • prions

  • viroids

  • satellite viruses

Solution

B.

prions

Prions have a distinct extracellular from but the extracellular form is entirely protein. The prion particle does not contain any nucleic acid.However, it is infectious and prions are known to cause a variety of diseases in animals such scrapie in sheep, bovine spongiform encephalopathy in cattle (BSE or mad cow disease' ) chronic wasting disease in deer and elk and kuru and a form a Creutz Feldt- Jakob disease (CJD) in humans. No prion diseases of plants are known.

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