Question

An organism that has peroxidase and superoxide dismutase but lacks catalase is most likely an:
a) aerobe
b) aerotolerant anaerobe
c) obligate anaerobe

Answer 1

An organism that has peroxidase and superoxide di mutase but lacks catalase is B

Answer 2

An organism that has superoxide dismutase but lacks catalase is ; ( B )

• Aerotolerant anaerobe

Aerotolerant anaerobe can synthesize superoxide dismutase but does not catalase for protection against ROS and this is because Aerotolerant anaerobes can survive in the absence or presence of oxygen.

An aerotolerant organism is tagged an anaerobe because it does not make use of oxygen during oxidation ( i.e. to produce energy ).

Hence we can conclude that An organism that has superoxide dismutase but lacks catalase is Aerotolerant anaerobe.

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