Multiple choice

Which of the following organisms contain superoxide dismutase but do not contain catalase?

  1. Strict aerobic microorganisms

  2. Facultative anaerobic microorganisms

  3. Microaerophile microorganisms

  4. Aerotolerant microorganisms
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aerotolerant microorganisms contain superoxide dismutase but do not contain catalase. Catalase breaks toxic hydrogen peroxide to water and oxygen. These organisms can tolerate oxygen radicals due to superoxide dismutase but cannot use it for growth.

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