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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

200 hours
20 days
20 minutes
20 hours

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Growth and Nutrition of Bacteria
A synergistic effect is observed when

one organism produces a growth factor utilized by another
All of these
microbial alteration of pH, aw, Eh favours the growth of another
one organism removes an inhibitory substance for another

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Growth and Nutrition of Bacteria
Implicit factors

None of these
depend on developing microflora
can be synergistic
both (a) and (b)

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Growth and Nutrition of Bacteria
The cell reproduction in bacteria may occur by

fragmentation
binary fission
budding
all of these

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Growth and Nutrition of Bacteria
The ability of Vibrio fischeri to produce bioluminescence chemicals only when a certain population density has been reached is an example of

Shelford's law of tolerance
Liebig's law of the minimum
Heisenberg's principle of uncertainty
quorum sensing

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Growth and Nutrition of Bacteria
The organism which grows best above 45°C are called

psychrophilic
any of these
thermophilic
mesosphilic

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