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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 minutes
20 hours
20 days
200 hours

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

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

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Growth and Nutrition of Bacteria
Which of the following has more tolerance for acidic pH (lower pH)?

None of these
Yeast and moulds
E. coli
Bacteria

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Growth and Nutrition of Bacteria
The combination of low levels of NaCl, NaNO3 (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

C. botulinum
all of these
Salmonella
S. aureus

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Growth and Nutrition of Bacteria
The straightforward method of binary fission explains how bacteria

grow in nutrient agar
reproduce
evolve
move

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Growth and Nutrition of Bacteria
Microaerophilic bacteria are those which require

None of these
low levels of oxygen for growth (lesser than O2 present in atmosphere)
oxygen for activation of enzymes
21 % oxygen for growth

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MORE MCQ ON Growth and Nutrition of Bacteria

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