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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
An organism has an optimal growth rate when the hydrogen ion concentration is very high. This organism is

neutrophile
aerotolerant anaerobe
acidophile
osmotolerant

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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
Exponential phase
Stationary phase
Lag phase

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Growth and Nutrition of Bacteria
A microbe, which grows at temperatures above 95° C is most likely to be

a fungus
an archaean
a protozoan
none of these

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Growth and Nutrition of Bacteria
The generation time of a culture that produces two generations per hour is

None of these
lesser than that produces three generations per hour
equal to that produces three generations per hour
greater than that produces three generations per hour

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Growth and Nutrition of Bacteria
A synergistic effect is observed when

All of these
microbial alteration of pH, aw, Eh favours the growth of another
one organism produces a growth factor utilized by another
one organism removes an inhibitory substance for another

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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

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

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