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A negative-sense RNA virus must carry in its virion

  • A.a DNA ligase
  • B.a ribosome
  • C.an RNA-dependent RNA polymerase
  • D.a reverse transcriptase

Answer: C

Antisense RNA has no translational function and cannot produce viral components by itself, and the cell has no enzyme able to copy RNA into RNA. The virus therefore packages its own transcriptase so that mRNA can be made as soon as the genome is uncoated.

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