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Microbiology of Foods

Microbiology of Foods
Yeast and mould count determination requires-

acidified potato glucose agar
nutrient agar
MacConkey agar
violet Red Bile agar

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Microbiology of Foods
NaCl can act as

None of these
Both (a) and (b)
antagonist at optimal concentrations
synergistically if added in excess of optimum level

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Microbiology of Foods
A psychrophilic halophile would be a microbe that prefers

warm temperatures and increased amounts of acid
cold temperatures and the absence of oxygen
warm temperatures and increased amounts of pressure
cold temperatures and increased amounts of salt

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Microbiology of Foods
Which of the following acid will have higher bacteriostatic effect at a given pH?

Acetic acid
Maleic acid
Citric acid
Tartaric acid

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Microbiology of Foods
What are the intrinsic factors for the microbial growth?

pH
Oxidation-Reduction Potential
Moisture
All of these

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Microbiology of Foods
Suspected colonies of Staphylococcus aureus when grown on Baird-Parker medium shall show

protease activity
none of these
catalase activity
coagulase activity

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