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Microbiology

Microbiology
The bacteria, which is more resistant to adverse environmental conditions, is

S flexneri
S boydii
S dysenteriae
S sonnei

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

173 Rad
73 Rad
7.3 Mrad
73 Gy

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Microbiology
Transmission of pneumonic plague from man to man is through

inoculation
all of these
ingestion
droplet infection

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Microbiology
Which of the following toxin causing botulism is less toxic to human beings?

Type B
Type C
None of these
Type A

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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
butyric acid
acetone
diacetyl

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

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

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