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Microbiology

Microbiology
Which of the following is a gram-positive bacteria?

Lactobacillus
All of these
Streptococci
Staphylococci

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Microbiology
Black kraut is caused by

the combined actions of plant enzymes and micro-organisms
the plant enzymes
the micro-organisms
None of these

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Microbiology
Species of Shigella which is predominant in India is

S dysenteriae
S boydii
S flexneri
S sonnei

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Microbiology
The media which serve(s) as enrichment media for Salmonella is/are

All of these
Tetrathionate broth
Brilliant green tetrathionate broth
Selenite-F broth

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Microbiology
Salmonellae can also be killed by

all of these
chlorination
boiling
pasteurisation

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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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