NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The bacteria with a oxidase positive results will give a catalase positive result also.
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True
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Fasle
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The oxidase test is used to identify bacteria that produce cytochrome c oxidase, an enzyme of the bacterial electron transport chain. (note: All bacteria that are oxidase positive are aerobic, and can use oxygen as a terminal electron acceptor in respiration. This does NOT mean that they are strict aerobes.
Detailed explanation-2: -Catalase is an enzyme that converts hydrogen peroxide to water and oxygen gas. The test is easy to perform; bacteria are simply mixed with H2O2. If bubbles appear (due to the production of oxygen gas) the bacteria are catalase positive. If no bubbles appear, the bacteria are catalase negative.
There is 1 question to complete.