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Microbiology

Microbiology
The bacteria, which is more resistant to adverse environmental conditions, is

S dysenteriae
S flexneri
S sonnei
S boydii

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

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

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Microbiology
Bacteria are

symbiotic
all of these
saprophytic
hyper parasitic

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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
Soft pickles are made so by pectolytic enzymes mostly from

none of these
yeasts
moulds
bacteria

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Microbiology
An enrichment medium for the isolation of Shigella is

Selenite F broth
Alkaline peptone water
Terathionate broth
none of these

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MORE MCQ ON Microbiology

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