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Which one of the following viruses has a double-stranded RNA genome?

  • A.Hepatitis B virus
  • B.Rotavirus
  • C.Poliovirus
  • D.Rabies virus

Answer: B

Rotavirus belongs to the Reoviridae, the family defined by segmented double-stranded RNA. Poliovirus is positive-sense single-stranded RNA, rabies virus is negative-sense single-stranded RNA, and hepatitis B virus is a DNA virus that uses reverse transcription.

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