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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 minutes
20 hours
200 hours
20 days

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Growth and Nutrition of Bacteria
The microorganisms that grow best in a low-oxygen environment is called a (n)

aerobe
anaerobe
facultative
microaerophile

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Growth and Nutrition of Bacteria
Bacteria and fungi multiply best

below 16°C
none of these
between 16-38°C
above 38°C

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

osmotolerant
neutrophile
acidophile
aerotolerant anaerobe

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Growth and Nutrition of Bacteria
What are the extrinsic factors for the microbial growth?

composition of gas phase
humidity
storage temperature
all of these

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Growth and Nutrition of Bacteria
The organism which obtain their energy from chemicals are designated as

chemotrophs
autotrophs
organotrophs
prototrophs

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