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Microbiology

Microbiology
Gram-negative bacterium is/are

All of these
Clostridia
Escherichia
Staphylococci

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Microbiology
Blackening in pickles occurs due to

the formation of hydrogen sulfide by bacteria
None of these
both (a) and (b)
growth of Pencillium

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Microbiology
The media which serve(s) as enrichment media for Salmonella is/are

Brilliant green tetrathionate broth
Selenite-F broth
All of these
Tetrathionate broth

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Microbiology
Salmonellois is caused by the

enterotoxin of Salmonella spp
neurotoxin of Salmonella spp
endotoxin of Salmonella spp
exoenterotoxin of Salmonella spp

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Microbiology
Dysentery may be caused by

enteropathogenic Escherichia coli
enteroinvasive E. coli
enterotoxigenic E. coli
verotoxigenic E. coli

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Microbiology
The milk streptococci produce acetoin that gets spontaneously oxidized yielding a flavorings agent (responsible for aroma of butter) that is

acetyl coA
acetone
butyric acid
diacetyl

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