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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Starvation proteins are produced by a culture during which of the following segments of the growth curve?

Exponential phase
Death phase
Lag phase
Stationary phase

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Growth and Nutrition of Bacteria
Microaerophilic bacteria are those which require

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

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

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Growth and Nutrition of Bacteria
The fragmentation occurs in

Bacillus subtilis
Streptomyces species
Nocardia species
None of these

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Growth and Nutrition of Bacteria
Antimicrobial constituents for the microbial growth in foods are

none of these
extrinsic factor
intrinsic factor
both (a) and (b)

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