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Bacteria that cannot grow in the presence of oxygen are

  • A.Strict anaerobes
  • B.Strict aerobes
  • C.Facultative anaerobes
  • D.Microaerophilic

Answer: A

Correct answer: Strict anaerobes

Strict (obligate) anaerobes are killed by oxygen, because they lack the enzymes that dispose of the toxic products of oxygen chemistry. Strict aerobes require it; facultative anaerobes grow with or without it; microaerophiles need it but only at low concentration.

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