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Microbiology

Microbiology
Which of the following is/are not a gram-positive bacteria?

Pseudomonas
Mycobacteria
Streptococci
None of these

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Microbiology
A bacterial food intoxication refers to

illness caused by presence of pathogens
both (a) and (b)
food borne illness caused by the presence of a bacterial toxin formed in food
None of these

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Microbiology
Gassy spoilage of green olives is usually caused by

Clostridium spp
Enterobacter spp
all of these
Bacillus spp

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Microbiology
Bacterial spoilage is identified by which of the following morphological characteristics?

Endospores
All of these
Encapsulation
Cell aggregation

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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
Which of the following species/subspecies of Klebsiella produce indole?

K pneumoniae subspecies pneumoniae
K oxytoca
K pneumoniae subspecies aerogenes
K pneumoniae subspecies rhinoscleromatis

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