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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
The average size of cells during the exponential phase of growth is

lesser than the lag phase
equal to the lag phase
none of these
greater than the lag phase

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Growth and Nutrition of Bacteria
Which of the following is the suitable temperature range for mesophiles?

20-30°C
25-40°C
>40°C
None of these

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

is killed by oxygen
requires less oxygen than is present in air
doesn't use oxygen but tolerates it
uses oxygen when present or grows without oxygen when absent

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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
a fungus
none of these
an archaean

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Growth and Nutrition of Bacteria
Which of the following procedures uses a photocell to measure absorbance of a culture to regulate the flow of culture media?

Trubidostat
Coulter Counter
Hemostat
Petroff-Hausser chamber

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

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