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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 days
20 hours
20 minutes
200 hours

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Growth and Nutrition of Bacteria
Implicit factors

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

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Growth and Nutrition of Bacteria
Pseudomonas pseudoflava can grow as

none of these
both (a) and (b)
chemo-lithotrophs
chemo-organotrophs

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Growth and Nutrition of Bacteria
Starvation proteins are produced by a culture during which of the following segments of the growth curve?

Death phase
Lag phase
Stationary phase
Exponential phase

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Growth and Nutrition of Bacteria
The average size of cells during the exponential phase of growth is

greater than the lag phase
lesser than the lag phase
none of these
equal to the lag phase

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Growth and Nutrition of Bacteria
A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the

organism cannot produce superoxide dismutase and/or catalase
organism can tolerate oxygen
broth is sterile
organism should be grown in an anaerobic chamber

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