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Microbiology

Microbiology
Primarily human pathogenic bacteria is/are ,

S paratyphi B
S paratyphi A
Salmonella typhi
all of these

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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

diacetyl
acetone
butyric acid
acetyl coA

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Microbiology
In Widal test the significant titres for H agglutinins is

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

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Microbiology
Slippery pickles occur due to

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

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Microbiology
Prodigiosin (red pigment) is produced by members of genus

Enterobacter
Serratia
Cirobacter
Hafnia

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Microbiology
Shriveling in fermented pickles results from the physical effect of

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

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MORE MCQ ON Microbiology

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