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Growth and Nutrition of Bacteria

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

Salmonella
S. aureus
C. botulinum
all of these

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

decline phase
lag phase
stationary phase
log 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
A synergistic effect is observed when

microbial alteration of pH, aw, Eh favours the growth of another
All of these
one organism produces a growth factor utilized by another
one organism removes an inhibitory substance for another

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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
an obligate aerobe
a thermophile
incapable of cell division

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Growth and Nutrition of Bacteria
An organism has an optimal growth rate when the hydrogen ion concentration is very high. This organism is

neutrophile
osmotolerant
acidophile
aerotolerant anaerobe

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