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Microbiology

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

Mycobacteria
Streptococci
None of these
Pseudomonas

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Microbiology
The bacteria which produce(s) β-galactosidase is/are

Citrobacter
Serratia
Enterohacter
all of these

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Microbiology
Soft pickles are made so by pectolytic enzymes mostly from

bacteria
yeasts
moulds
none of these

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Microbiology
Traveller's diarrhea is caused by

enteropathogenic Escherichia coli (EPEC)
entero haemorrhagic E. coli (EHEC)
entero invasive E. coli (EIEC)
entero toxigenic E. coli (ETEC)

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Microbiology
Which of the following can readily kill Salmonellae?

Moist heat at 55°C for 10 min
Moist heat at 55°C for 20 min
Moist heat at 55°C for 30 min
Moist heat at 55°C for 1 hr

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Microbiology
The agent(s) which can cause plague is/are

Yersinia pestis
Proteus mirabilis
All of these
Pseudomonas aeruginosa

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