Question

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multiple choice question
performing assays for the presence of oxidase or to determine susceptibility to antibiotics are ______ methods of bacterial identification.
phenotypic
genotypic
immunologic
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Explanation:

Phenotypic methods of bacterial identification involve analyzing observable characteristics (like enzyme presence or antibiotic susceptibility) of the bacteria. Genotypic methods focus on genetic material, and immunologic methods involve immune - related responses. Since the assays here look at observable traits (oxidase presence, antibiotic susceptibility), the correct method is phenotypic.

Answer:

A. phenotypic