Question

multiple choice question
which of the following organisms does not utilize oxygen regardless of availability?
o aerotolerant anaerobe
o facultative anaerobe
o microaerophile
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Explanation:

• Microaerophiles need low - oxygen levels for growth.
• Facultative anaerobes can use oxygen when available (aerobic respiration) and switch to anaerobic respiration when oxygen is absent.
• Aerotolerant anaerobes do not use oxygen at all, regardless of its availability. They have mechanisms to tolerate oxygen but do not utilize it for metabolism.

Answer:

aerotolerant anaerobe