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Microbiology

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

Streptococci
Lactobacillus
All of these
Staphylococci

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Microbiology
Species of Shigella which is predominant in India is

S dysenteriae
S sonnei
S boydii
S flexneri

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Microbiology
Heat-stable enterotoxin of Escherichia coli activates

adenylate cyclase
both of the above
guanylate cyclase
none of these

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Microbiology
The bacteria that is negative for fermentation of mannitol is

S sonnei
S boydii
S flexneri
S dysenteriae

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Microbiology
Slippery pickles occur due to

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

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

Cirobacter
Enterobacter
Serratia
Hafnia

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