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Microbiology

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

Clostridia
Salmonella
Pseudomonas
None of these

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Microbiology
The most important bacterium developing acidity in both low and high salt brines is

B. subtilis
L. plantarum
L. lactis
L. brevis

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Microbiology
Staphylococcal intoxication is caused by the toxin m the food from

S. cerevisiae
S. thermophillus
Staphylococcus aureus
none of these

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Microbiology
Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae?

They are oxidase-negative
They ferment glucose
They reduce nitrates to nitrites
They are catalase-positive

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

S Indiana
S newport
S enteritidis
S typhimurium

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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
diacetyl
butyric acid
acetone

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