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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 minutes
20 days
200 hours
20 hours

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Growth and Nutrition of Bacteria
An organism that expends energy to grow in a habitat with a low water activity in order to maintain internal solute concentrations to retain water is

aerotolerant anaerobe
osmotolerant
alkalophile
acidophile

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Growth and Nutrition of Bacteria
The fragmentation occurs in

None of these
Bacillus subtilis
Streptomyces species
Nocardia species

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Growth and Nutrition of Bacteria
Exponential phase of growth curve of bacteria is of limited duration because of

exhaustion of nutrients
accumulation of toxic metabolites
rise in cell density
all of these

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Growth and Nutrition of Bacteria
Antimicrobial constituents for the microbial growth in foods are

none of these
both (a) and (b)
extrinsic factor
intrinsic factor

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Growth and Nutrition of Bacteria
An organism is completely dependent on atmospheric O2 for growth. This organism is

facultative anaerobe
osmotolerant
acidophile
obligate aerobe

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