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

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

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Growth and Nutrition of Bacteria
Which of the following organisms typically get their carbon for biosynthesis from organic compounds?

Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
None of these
Photosynthetic cyanobacteria (phototrophic metabolism)
Aerobic, glucose-respiring bacteria (aerobic respiration)

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