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Growth and Nutrition of Bacteria

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

phototrophs
chemotrophs
photo-organotrophs
lithotrophs

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

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

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Growth and Nutrition of Bacteria
What are the extrinsic factors for the microbial growth?

all of these
storage temperature
humidity
composition of gas phase

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Growth and Nutrition of Bacteria
The organism which obtain their energy from chemicals are designated as

chemotrophs
organotrophs
prototrophs
autotrophs

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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
autotrophs
photo-organotrophs

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Growth and Nutrition of Bacteria
The ability of Vibrio fischeri to produce bioluminescence chemicals only when a certain population density has been reached is an example of

Heisenberg's principle of uncertainty
Liebig's law of the minimum
quorum sensing
Shelford's law of tolerance

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