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Interferons are

  • A.antibiotic proteins
  • B.antiviral proteins
  • C.antigen proteins
  • D.all of the above

Answer: B

Correct answer: antiviral proteins

Interferons are cytokines released by virus-infected cells that induce an antiviral state in neighbouring cells, switching on enzymes that degrade viral RNA and block translation. They act on the cell rather than on the virus, and they are not specific to any one virus, which is what makes them an early and general defence rather than an adaptive one.

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