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Microbiology

Microbiology
Which of the following toxin causing botulism is less toxic to human beings?

Type A
Type B
None of these
Type C

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Microbiology
Blackening in pickles occurs due to

None of these
growth of Pencillium
both (a) and (b)
the formation of hydrogen sulfide by bacteria

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

S enteritidis
S typhimurium
S Indiana
S newport

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Microbiology
Coliform bacteria on fermentation of carbohydrates yields

all of these
acetic acid
lactic acid
formic acid

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

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

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Microbiology
Botulism is caused by the presence of toxin developed by

Clostridium botulinum
none of these
Clostridium sporogenes
Clostridium tyrobutyricum

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