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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
The organism which grows best above 45°C are called

mesosphilic
psychrophilic
any of these
thermophilic

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

an archaean
a protozoan
none of these
a fungus

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Growth and Nutrition of Bacteria
The term aerotolerant anaerobe refers to an organism that

requires less oxygen than is present in air
doesn't use oxygen but can grow in the presence of oxygen
is killed by oxygen
prefers to grow without oxygen

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Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 hours
200 hours
20 minutes
20 days

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Growth and Nutrition of Bacteria
The growth is normally expressed as __________ in turbidimetric measurement

cfu/ml
optical density
mg N2 /ml
cells per ml

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Growth and Nutrition of Bacteria
Some organisms can use reduced inorganic compounds as electron donors and are termed as

photo-organotrophs
phototrophs
lithotrophs
chemotrophs

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