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Microbiology

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

Enterohacter
Serratia
Citrobacter
all of these

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

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

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Microbiology
Prodigiosin (red pigment) is produced by members of genus

Hafnia
Serratia
Cirobacter
Enterobacter

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Microbiology
In Yersinia pestis, capsule is best demonstrated in cultures grown at

37°C
45°C
25°C
29°C

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

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

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Microbiology
Gassy spoilage of green olives is usually caused by

Bacillus spp
Enterobacter spp
Clostridium spp
all of these

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