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Viroids consist of

  • A.naked circular RNA, with no coat
  • B.circular DNA enclosed in a small capsid
  • C.protein alone, with no nucleic acid
  • D.double-stranded RNA inside an envelope

Answer: A

A viroid is a small, very stable circular RNA of roughly three to four hundred bases, carrying no capsid at all. They are plant pathogens, and the absence of a coat is the clearest difference from a conventional virus.

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