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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Lag phase is also known as

transitional period
none of these
generation time
period of initial adjustment

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Growth and Nutrition of Bacteria
Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as

photo-organotrophs
fastidious hetrotrophs
chemo-lithotrophs
chemotrophs

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Growth and Nutrition of Bacteria
A synergistic effect is observed when

one organism removes an inhibitory substance for another
microbial alteration of pH, aw, Eh favours the growth of another
All of these
one organism produces a growth factor utilized by another

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Growth and Nutrition of Bacteria
What is the primary source of food for marine life?

Sea weed
Phytoplankton
Zooplankton
Grass

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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?

Death phase
Stationary phase
Exponential phase
Lag phase

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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
Shelford's law of tolerance
quorum sensing
Liebig's law of the minimum

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