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Microbiology

Microbiology
Primarily human pathogenic bacteria is/are ,

S paratyphi A
S paratyphi B
all of these
Salmonella typhi

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Microbiology
Blackening in pickles occurs due to

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

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Microbiology
Which of the following is the commonest species of Salmonella for causing zoonotic disease?

S newport
S enteritidis
S typhimurium
S Indiana

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Microbiology
Example of the pathogenic bacteria is/are

L biflexa
Leptospira interrogans
All of these
Lparva

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Microbiology
The application of Gamma rays destroys botulism toxin. The dose of gamma rays required for this purpose is

73 Rad
7.3 Mrad
73 Gy
173 Rad

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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

acetone
butyric acid
acetyl coA
diacetyl

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