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Growth and Nutrition of Bacteria

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

composition of gas phase
humidity
storage temperature
all of these

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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

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

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Growth and Nutrition of Bacteria
The fragmentation occurs in

None of these
Nocardia species
Bacillus subtilis
Streptomyces species

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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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Growth and Nutrition of Bacteria
A spore differs from an actively replicating bacterium in that the spore

is metabolically inactive
All of these
is produced during a process involving asymmetric division
is able to withstand more extreme conditions than the replicating cell

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

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

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