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Microbiology

Microbiology
The bacteria that is negative for fermentation of mannitol is

S dysenteriae
S boydii
S flexneri
S sonnei

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Microbiology
Which of the following determine the pathogenicity of Yersinia pestis?

All of these
Production of pigmented colonies on haemin containing media
F1 envelope antigen
V and W antigens

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Microbiology
The enzyme, which hydrolyses the murein is

tannase
none of these
lysozyme
perxoidase

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Microbiology
Heat-stable enterotoxin of Escherichia coli activates

guanylate cyclase
none of these
both of the above
adenylate cyclase

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Microbiology
The application of Gamma rays destroys botulism toxin. The dose of gamma rays required for this purpose is

73 Gy
173 Rad
7.3 Mrad
73 Rad

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

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

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