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GROWTH AND NUTRITION OF BACTERIA

Growth and Nutrition of Bacteria
Postgates assay technique is useful in determining if a cell is viable even though it is

too small to see
incapable of cell division
an obligate aerobe
a thermophile

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

composition of gas phase
all of these
humidity
storage temperature

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Growth and Nutrition of Bacteria
Quantitative measurement of bacterial growth can be carried out by measuring

cell count
cell mass
cell activity
all of these

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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
chemotrophs
chemo-lithotrophs

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Growth and Nutrition of Bacteria
The combination of low levels of NaCl, NaNO3 (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

S. aureus
Salmonella
all of these
C. botulinum

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