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Microbiology

Microbiology
Transmission of bubonic plague is by

all of these
rat flea
inhalation
ingestion

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Microbiology
Shriveling in fermented pickles results from the physical effect of

too strong vinegar solution
too strong salt solution
too strong sugar solution
all of these

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Microbiology
The favouring conditions for floaters is

thick skin that does not allow gas to diffuse out
none of these
both (a) and (b)
high intial amounts of salt

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Microbiology
Slippery pickles occur due to

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

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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
acetyl coA
butyric acid
diacetyl

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Microbiology
Which of the following gram-positive bacteria causes pharyngitis (sore throat)?

Streptococcus
Staphylococcus
Mycobacterium
Neisseria

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