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Microbiology

Microbiology
Soft pickles are made so by pectolytic enzymes mostly from

moulds
yeasts
bacteria
none of these

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Microbiology
Which of the following is the commonest species of Salmonella for causing zoonotic disease?

S newport
S enteritidis
S Indiana
S typhimurium

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Microbiology
In Widal test, the significant titre for O agglutinins is generally

1:50 or more
1:100 or more
1:150 or more
1:2.00 or more

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Microbiology
Dysentery may be caused by

enteroinvasive E. coli
verotoxigenic E. coli
enteropathogenic Escherichia coli
enterotoxigenic E. coli

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Microbiology
Gram-positive bacteria, responsible for food poisoning, is/are

all of these
Pseudomonas
Mycoplasmas
Clostridia

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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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