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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

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

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

all of these
storage temperature
humidity
composition of gas phase

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

cell mass
all of these
cell count
cell activity

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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
photo-organotrophs
chemotrophs
fastidious hetrotrophs

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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
C. botulinum
all of these
Salmonella

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