Question

multiple choice question
selective media are used for the ______

• growing of fastidious microbes only
• growth of a broad spectrum of microbes
• primary isolation of a specific microbe
• primary differentiation of specific microbes

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Explanation:

To solve this, we analyze the function of selective media in microbiology:

• "Growing of fastidious microbes only" is incorrect as fastidious microbes need enriched media.
• "Growth of a broad spectrum of microbes" describes non - selective (general) media.
• "Primary isolation of a specific microbe" is correct. Selective media contains components that inhibit the growth of unwanted microbes and promote the growth of a specific microbe, which is useful for isolating that specific microbe from a mixed population.
• "Primary differentiation of specific microbes" is the function of differential media, not selective media.

Answer:

C. primary isolation of a specific microbe