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Microbiology of Foods

Microbiology of Foods
Most spoilage bacteria grow at

any of the pH
acidic pH
neutral pH
alkaline pH

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Microbiology of Foods
NaCl can act as

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

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

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

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

coagulase activity
catalase activity
protease activity
none of these

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

Citric acid
Maleic acid
Tartaric acid
Acetic acid

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Microbiology of Foods
The microbiological examination of coliform bacteria in foods preferably use

eosine Methylene blue agar
all of these
violet Red Bile agar
MacConkey broth

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