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The first phase of the viral multiplication cycle is

  • A.penetration
  • B.biosynthesis
  • C.uncoating
  • D.adsorption or attachment

Answer: D

Correct answer: adsorption or attachment

The cycle begins with adsorption: a protein on the virus binds a specific receptor on the host cell. Nothing can follow until that happens, and which receptor the virus recognises is what decides its host range and the tissues it infects.

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