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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
In the exponential phase, the cells and cell mass

are constant
first increases then decreases
decreases
double at a constant rate

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Growth and Nutrition of Bacteria
Starvation proteins are produced by a culture during which of the following segments of the growth curve?

Stationary phase
Death phase
Exponential phase
Lag phase

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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

photo-organotrophs
phototrophs
autotrophs
chemotrophs

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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

C. botulinum
all of these
S. aureus
Salmonella

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

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

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

a fungus
none of these
an archaean
a protozoan

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