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Microbiology

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

Cirobacter
Serratia
Enterobacter
Hafnia

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

S. cerevisiae
Staphylococcus aureus
S. thermophillus
none of these

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Microbiology
Heat-labile enterotoxin of Escherichia coli activates

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

butyric acid
acetyl coA
diacetyl
acetone

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Microbiology
The reaction(s) that is/are usually positive in Escherichia coli, is/ are

Indole reaction
Glucose fermentation
Methyl red reaction
All of these

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Microbiology
Species of Shigella which is predominant in India is

S sonnei
S flexneri
S boydii
S dysenteriae

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