QUESTION 17 Mike, a student in BIO 225, was performing a catalase test and had a

Question

QUESTION 17 Mike, a student in BIO 225, was performing a catalase test and had already set up a positive control with a known catalase positive d bubbl les when the hydrogen peroxide was added to the control sample. However, before he could perform the test with his unknown test bacteria sample, he spilled the remaining hydrogen peroxide from his lab kit supplies so he used some that he had in his home medicine cabinet. No bubbles were produced after the addition of the hydrogen peroxide What explanation of these results would you give Mike? @ Mike can only use eScience supplied hydrogen peroxide for this catalase test Mike shouild conduct a test with a known catalase positive bacteria using the hydrogen peroxide from his medicine cabinet before interpreting his results Mike's test bacteria sample is catalase negative

Explanation / Answer

Mike should conduct a test with known catalase positive bacteria using the hydrogen peroxide from his medicine cabinet before interpreting his results.

Mike should be testing the known catalase positive bacteria with the home medicine hydrogen peroxide if it give the positive result for the known catalase positive bacteria we can ensure that the home medicine hydrogen peroxide is effective and working for the catalase test. If no bubbles are observed from known sample with home medicine hydrogen peroxide we say that the hydrogen peroxide is ineffective and other sample of hydrogen peroxide should be used.

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