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Growth and Nutrition of Bacteria

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 generation time of a culture that produces two generations per hour is

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

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Growth and Nutrition of Bacteria
All organisms require at least small amounts of carbondioxide, However, some can use CO2 as their sole source of carbon. Such organisms are termed as

phototrophs
chemotrophs
photo-organotrophs
autotrophs

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Growth and Nutrition of Bacteria
Bacteria of genus Nitrosomonas use __________ as their electron source.

H2S
light
ammonia
succinate

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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

S. aureus
C. botulinum
all of these
Salmonella

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

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

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