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

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

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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 cannot tolerate oxygen
organism are aerobes
organism should be grown in an anaerobic chamber

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

Aerobic, glucose-respiring bacteria (aerobic respiration)
Anaerobic, glucose-respiring bacteria (anaerobic respiration)
Glucose-fermenting bacteria (fermentation)
Ammonia-oxidizing bacteria (chemolithotrophic bacteria)

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