Which of the bacteria (A-E) would you expect to be catalase positive and why? There may...
Which of the bacteria (A-E) would you expect to be catalase positive and why? There may be more than one of the bacteria positive for catalase.
A. Obligate Aerobe B. Facultative Anaerobe C. Aerotolerant Anaerobe D. Obligate Anaerobe E. Microaerophile
Homework Answers
Answer =
The bacteria expect to be catalase positive are
A.Obligate Aerobe
B. Facultative Anaerobe
E.Microaerophile
Explanation - The enzyme Catalase is produced by bacteria that respire using oxygen, and protects them from the toxic by products such as H2O2 of oxygen metabolism.
Catalase positive bacteria may be strict aerobes as well as facultative Anaerobe.
because they have ability to respire using oxygen as well as a terminal oxygen acceptor.
obligate aerobes are the organisms that need oxygen because they can not ferment or respire anaerobically.
Facultative Anaerobe are the organisms that makes ATP by aerobic respiration if oxygen is present.
Microaerophile they are catalase positive because they require oxygen to survive.
INCORRECT OPTIONS
C.Aerotolerant Anaerobe - they are catalase negative because because can not use oxygen to grow but tolerate its presence.
D.Obligate Anaerobe - they are catalase negative because because they can live only in environment that lacks oxygen.
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