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Microbiology

Microbiology
The bacteria which produce(s) β-galactosidase is/are

all of these
Serratia
Enterohacter
Citrobacter

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Microbiology
Transmission of pneumonic plague from man to man is through

droplet infection
inoculation
all of these
ingestion

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Microbiology
Shriveling in fermented pickles results from the physical effect of

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

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Microbiology
The gram-positive bacteria lack __________ structure/component?

plasma membrane
outer membrane
murein
teichoic acid

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Microbiology
Heat-labile enterotoxin of Escherichia coli activates

none of these
adenylate cyclase
guanylate cyclase
both (a) and (b)

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Microbiology
The growth of black-pigmented Bacillus nigrificans, a causative agent of black pickle is favoured by

All of these
low level of available nitrogen
neutral or slightly alkaline brine
presence of carbohydrate like glucose

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