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Microbiology

Microbiology
Which of the following is/are not a gram-positive bacteria?

Streptococci
Pseudomonas
Mycobacteria
None of these

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Microbiology
Group I C. botulinum strains generally includes in

all types of strains (proteolytic)C, D and F
all types of strains (proteolytic)A, B and F
None of these
all types of strains (non-proteolytic) E and F

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

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

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Microbiology
Too long a fermentation of sauerkraut may favour the growth of

Bacillus subtilis
Lactobacillus brevis
Lactobacillus lactis
none of these

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Microbiology
Floaters or bloaters may result from

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

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Microbiology
Slippery pickles occur due to

broken scums of film yeasts on the surface of brine
both (a) and (b)
growth of encapsulated bacteria
addition of high amount of salt

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