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Microbiology

Microbiology
The bacteria which produce(s) β-galactosidase is/are

Serratia
Citrobacter
all of these
Enterohacter

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Microbiology
The milk streptococci produce acetoin that gets spontaneously oxidized yielding a flavorings agent (responsible for aroma of butter) that is

acetyl coA
butyric acid
acetone
diacetyl

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Microbiology
Which of the following is a food infection?

Staphylococcal intoxication
None of these
Salmonellois
Botulism

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Microbiology
A bacterial food intoxication refers to

food borne illness caused by the presence of a bacterial toxin formed in food
illness caused by presence of pathogens
both (a) and (b)
None of these

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Microbiology
Shriveling in fermented pickles results from the physical effect of

too strong sugar solution
too strong vinegar solution
too strong salt solution
all of these

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Microbiology
The bacteria that is negative for fermentation of mannitol is

S sonnei
S flexneri
S dysenteriae
S boydii

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