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Microbiology

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

all of these
Serratia
Enterohacter
Citrobacter

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Microbiology
Traveller's diarrhea is caused by

entero invasive E. coli (EIEC)
entero toxigenic E. coli (ETEC)
enteropathogenic Escherichia coli (EPEC)
entero haemorrhagic E. coli (EHEC)

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Microbiology
The elimination of the scum of yeasts in the brine during the fermentation include

all of these
agitation of the surface
addition of the sorbic acid
addition of the mustard oil

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Microbiology
Which of the following(s) bacteria belong to the family Entero-bacteriaceae?

Shigella
Yersinia
All of these
Salmonella

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Microbiology
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests?

Fermentation of sucrose and cellobiose
Decarboxylation of ornithine
Motility at 22°C
All of these

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Microbiology
Which of the following media is selective for Salmonella?

Wilson and Blair's brilliant-green bismuth sulphite agar medium
Bile salt agar
Thiosulphate citrate bile salt agar
All of these

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