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Microbiology

Microbiology
Gassy spoilage of green olives is usually caused by

all of these
Enterobacter spp
Clostridium spp
Bacillus spp

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Microbiology
Prodigiosin (red pigment) is produced by members of genus

Serratia
Cirobacter
Enterobacter
Hafnia

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Microbiology
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests?

All of these
Fermentation of sucrose and cellobiose
Decarboxylation of ornithine
Motility at 22°C

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Microbiology
Which of the following media is selective for Salmonella?

All of these
Bile salt agar
Wilson and Blair's brilliant-green bismuth sulphite agar medium
Thiosulphate citrate bile salt agar

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Microbiology
Gram-negative bacterium is/are

Escherichia
All of these
Staphylococci
Clostridia

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

teichoic acid
plasma membrane
outer membrane
murein

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