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Microbiology

Microbiology
Bacteria are

all of these
saprophytic
symbiotic
hyper parasitic

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

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

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Microbiology
In Widal test the significant titres for H agglutinins is

1:400 or more
1:100 ormore
1:50 or more
1:200 or more

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Microbiology
Verotoxin 1 of Escherichia coli is similar to

shiga toxin
heat-labile enterotoxin of E. coli
cholera toxin
heat-stable enterotoxin of E. coli

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Microbiology
Slimy or ropy kraut is caused by

Lactobacillus lactis
encapsulated varieties of Lactobacillus plantarum
encapsulated varieties of Lactobacillus brevis
None of these

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Microbiology
Transmission of bubonic plague is by

inhalation
all of these
ingestion
rat flea

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