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Microbiology

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

Cirobacter
Enterobacter
Hafnia
Serratia

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Microbiology
Enterobacter can be differentiated from Klebsiella by

none of these
motility
both (a) and (b)
ornithine positivity

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

None of these
Type B
Type C
Type A

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Microbiology
The favouring conditions for floaters is

high intial amounts of salt
none of these
both (a) and (b)
thick skin that does not allow gas to diffuse out

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Microbiology
Floaters or bloaters may result from

gas being formed by yeasts
hollow cucumbers
hetero fermentative lactic acid bacteria
all of these

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Microbiology
Blackening in pickles occurs due to

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

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