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Penetration of a virus into a host cell

  • A.occurs only after the genome has replicated
  • B.requires energy and follows attachment almost at once
  • C.occurs before attachment
  • D.requires no energy from the cell

Answer: B

Penetration is an energy-dependent process that begins almost instantaneously after attachment, by direct translocation, by endocytosis, or by fusion of the envelope with a cell membrane. Because it needs cellular energy it does not occur on a dead cell.

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