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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 hours
20 days
200 hours
20 minutes

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Growth and Nutrition of Bacteria
Lag phase is also known as

period of initial adjustment
generation time
transitional period
none of these

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

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

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Growth and Nutrition of Bacteria
The combination of low levels of NaCl, NaNO3 (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

all of these
Salmonella
S. aureus
C. botulinum

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

a protozoan
none of these
an archaean
a fungus

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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

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

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