FOOD MICROBIOLOGY
MICROORGANISMS IN FOOD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To increase the concentration of a sample
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To decrease the concentration of a sample
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To measure the pH of a sample
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To measure the temperature of a sample
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Detailed explanation-1: -Serial dilutions are used in microbiology to reduce bacterial concentrations to the required concentration for a particular test method or to a concentration that is easier to count when plated to an agar plate.
Detailed explanation-2: -Hint: The term dilution is the phenomenon by which more solvent is added to a solution. This results in an increase of the total volume of the solution and decreases the concentration of the solution.
Detailed explanation-3: -Serial dilution only reduces the number of bacteria/viable cells but doesn’t separate them like in other techniques like Flow Cytometry. The main objective of serial dilution is to reduce the concentration of a substance, typically a chemical or biological sample, in a series of steps.