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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

all of these
Clostridium spp
Enterobacter spp
Bacillus spp

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Microbiology
Which of the following gram-negative bacteria is/are not aerobic?

Pseudomonas
Escherichia
None of these
Neisseria

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Microbiology
The growth of black-pigmented Bacillus nigrificans, a causative agent of black pickle is favoured by

All of these
low level of available nitrogen
presence of carbohydrate like glucose
neutral or slightly alkaline brine

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Microbiology
Black kraut is caused by

the micro-organisms
None of these
the plant enzymes
the combined actions of plant enzymes and micro-organisms

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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
The technique(s), used for the assay of heat-labile enterotoxin produced by Escherichia coli, is/are

Steroid production in Yl mouse adrenal cell culture
Morphological changes in Chinese hamster ovary
All of these
Enzyme-linked immunosorbent assay

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