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Microbiology

Microbiology
Soft pickles are made so by pectolytic enzymes mostly from

bacteria
yeasts
none of these
moulds

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Microbiology
The staphylococcal intoxication refers to presence of

mycotoxin
neurotoxin
an enterotoxin
All of these

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Microbiology
An enrichment medium for the isolation of Shigella is

Terathionate broth
Alkaline peptone water
Selenite F broth
none of these

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Microbiology
Enterobacter can be differentiated from Klebsiella by

ornithine positivity
motility
both (a) and (b)
none of these

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

Glucose fermentation
Indole reaction
All of these
Methyl red reaction

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

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

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