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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

all of these
Bacillus spp
Clostridium spp
Enterobacter spp

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Microbiology
Which of the following can readily kill Salmonellae?

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

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Microbiology
Botulism is caused by the presence of toxin developed by

Clostridium sporogenes
Clostridium botulinum
none of these
Clostridium tyrobutyricum

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Microbiology
Heat-labile enterotoxin of Escherichia coli activates

adenylate cyclase
guanylate cyclase
none of these
both (a) and (b)

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Microbiology
The gram-positive bacteria lack __________ structure/component?

murein
plasma membrane
outer membrane
teichoic acid

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Microbiology
The media which serve(s) as enrichment media for Salmonella is/are

Brilliant green tetrathionate broth
All of these
Selenite-F broth
Tetrathionate broth

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