NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A species of bacterium does not use oxygen, but will grow in its presence is classified as a ____
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microaerophile
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facultative anaerobe
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obligate anaerobe
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obligate aerobe
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Explanation:
Detailed explanation-1: -Facultative anaerobes show better growth in the presence of oxygen but will also grow without it. Although aerotolerant anaerobes do not perform aerobic respiration, they can grow in the presence of oxygen. Most aerotolerant anaerobes test negative for the enzyme catalase.
Detailed explanation-2: -Obligate anaerobes, which live only in the absence of oxygen, do not possess the defenses that make aerobic life possible and therefore cannot survive in air.
Detailed explanation-3: -In the presence of oxygen, facultative anaerobes use aerobic respiration; without oxygen, some of them ferment, others use anaerobic respiration.
There is 1 question to complete.