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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 days
20 hours
200 hours
20 minutes

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

any of these
psychrophilic
thermophilic
mesosphilic

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Growth and Nutrition of Bacteria
What are the extrinsic factors for the microbial growth?

composition of gas phase
storage temperature
humidity
all of these

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Growth and Nutrition of Bacteria
Implicit factors

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

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Growth and Nutrition of Bacteria
Quantitative measurement of bacterial growth can be carried out by measuring

cell activity
all of these
cell mass
cell count

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Growth and Nutrition of Bacteria
Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as

fastidious hetrotrophs
chemotrophs
photo-organotrophs
chemo-lithotrophs

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