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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Lag phase is also known as

period of initial adjustment
none of these
transitional period
generation time

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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

all of these
C. botulinum
S. aureus
Salmonella

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Growth and Nutrition of Bacteria
The average size of cells during the exponential phase of growth is

greater than the lag phase
none of these
lesser than the lag phase
equal to the lag phase

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Growth and Nutrition of Bacteria
Autotrophic bacteria are those which

form a long chain glycocalyx
produce a blue-green pigment
make their own food
are highly susceptible to penicillin

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Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 minutes
200 hours
20 hours
20 days

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Growth and Nutrition of Bacteria
An organism that expends energy to grow in a habitat with a low water activity in order to maintain internal solute concentrations to retain water is

alkalophile
aerotolerant anaerobe
osmotolerant
acidophile

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