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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

Clostridium spp
Enterobacter spp
all of these
Bacillus spp

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Microbiology
The elimination of the scum of yeasts in the brine during the fermentation include

addition of the mustard oil
all of these
agitation of the surface
addition of the sorbic acid

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Microbiology
The botulism intoxication occurs due to

mycotoxin
all of these
neurotoxin
an enterotoxin

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

Glucose fermentation
All of these
Methyl red reaction
Indole reaction

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Microbiology
The Bacillus cereus causes gasteroenteritis by the production of an exoenterotoxin which is released in food as a result of

cell permeation
cell growth
cell damage
cell autolysis

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

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

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