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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
The period between inoculation of bacteria in a culture medium and beginning of multiplication is known as

log phase
stationary phase
lag phase
decline phase

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

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

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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
autotrophs
photo-organotrophs
chemotrophs

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

chemotrophs
prototrophs
autotrophs
organotrophs

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Growth and Nutrition of Bacteria
Microaerophilic bacteria are those which require

oxygen for activation of enzymes
low levels of oxygen for growth (lesser than O2 present in atmosphere)
21 % oxygen for growth
None of these

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

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

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