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Growth and Nutrition of Bacteria

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

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

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Growth and Nutrition of Bacteria
The straightforward method of binary fission explains how bacteria

move
evolve
grow in nutrient agar
reproduce

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

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

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

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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

chemo-lithotrophs
chemotrophs
photo-organotrophs
fastidious hetrotrophs

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

phototrophs
lithotrophs
chemotrophs
photo-organotrophs

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