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Microbiology

Microbiology
Soft pickles are made so by pectolytic enzymes mostly from

yeasts
moulds
bacteria
none of these

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Microbiology
Floaters or bloaters may result from

gas being formed by yeasts
hollow cucumbers
hetero fermentative lactic acid bacteria
all of these

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Microbiology
Which of the following species/subspecies of Klebsiella produce indole?

K oxytoca
K pneumoniae subspecies rhinoscleromatis
K pneumoniae subspecies pneumoniae
K pneumoniae subspecies aerogenes

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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
The reaction(s) that is/are usually positive in Escherichia coli, is/ are

All of these
Methyl red reaction
Indole reaction
Glucose fermentation

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Microbiology
Staphylococcal intoxication is caused by the toxin m the food from

none of these
S. thermophillus
S. cerevisiae
Staphylococcus aureus

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