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

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

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Growth and Nutrition of Bacteria
A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the

organism cannot produce superoxide dismutase and/or catalase
organism should be grown in an anaerobic chamber
organism cannot tolerate oxygen
organism are aerobes

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

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

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