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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
Dysentery may be caused by

enteroinvasive E. coli
enterotoxigenic E. coli
verotoxigenic E. coli
enteropathogenic Escherichia coli

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Microbiology
Which of the following is the commonest species of Salmonella for causing zoonotic disease?

S enteritidis
S Indiana
S newport
S typhimurium

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Microbiology
Which of the following property(ies), shown by the organisms belong(s) to the family Enterobacteriaceae?

They are oxidase-negative
They are catalase-positive
All of these
They ferment glucose

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

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

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Microbiology
Hollow pickles are obtained as a result of

loose packing in the vat
both (a) and (b)
none of these
too strong or too weak brine

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