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Which statement correctly contrasts a virus with a bacterium?

  • A.Both divide by binary fission
  • B.A virus has either DNA or RNA, a bacterium has both
  • C.A virus has both DNA and RNA, a bacterium has only one
  • D.Neither has nucleic acid

Answer: B

Carrying one type of nucleic acid rather than both is one of the clearest distinctions, alongside the absence of ribosomes and of energy generation. Bacteria are cells and divide in two; viruses are assembled from separately made parts.

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