Obligate Anaerobes
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Questions and Answers

What is the main reason for the oxygen sensitivity of obligate anaerobes?

  • Lack of oxygen within cells
  • High atmospheric oxygen concentration
  • Formation of reactive oxygen species
  • Oxidative stress and enzyme production (correct)

    • What can molecular oxygen be readily reduced to within cells?

  • Methane and ethane
  • Nitrogen and hydrogen
  • Carbon dioxide and water
  • Superoxide and hydrogen peroxide (correct)

    • What are superoxide, hydrogen peroxide, and hydroxyl radicals collectively known as?

  • Oxidative stress molecules
  • Harmless compounds
  • Reactive oxygen species (ROS) (correct)
  • Anaerobic byproducts

    • At what oxygen concentration do some obligate anaerobes lose viability?

    <p>Greater than 0.5%</p> Signup and view all the answers

    What is the result of a reaction between superoxide and hydrogen peroxide?

    <p>Formation of a free hydroxyl radical (OH.)</p> Signup and view all the answers

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