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Microbiology

Microbiology
Coliform bacteria on fermentation of carbohydrates yields

all of these
formic acid
lactic acid
acetic acid

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Microbiology
Abnormal fermentation of cabbage may result in a cheese like odour caused by

all of these
butyric acid
caprioc acid and Valeric acid
propionic acid

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Microbiology
Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) because

it contains high salt concentration
it is less inhibitory to S. Dysentriae and S. flexneri
it is selective
it imparts better growth

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Microbiology
Heat-labile enterotoxin of Escherichia coli activates

both (a) and (b)
none of these
guanylate cyclase
adenylate cyclase

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Microbiology
Gram-negative bacterium is/are

Clostridia
Staphylococci
All of these
Escherichia

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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
All of these
Decarboxylation of ornithine
Motility at 22°C

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