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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Which of the following is the suitable temperature range for mesophiles?

>40°C
25-40°C
20-30°C
None of these

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Growth and Nutrition of Bacteria
The ability of Vibrio fischeri to produce bioluminescence chemicals only when a certain population density has been reached is an example of

quorum sensing
Heisenberg's principle of uncertainty
Shelford's law of tolerance
Liebig's law of the minimum

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

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

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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
S. aureus
C. botulinum
Salmonella

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Growth and Nutrition of Bacteria
The fragmentation occurs in

Nocardia species
Bacillus subtilis
Streptomyces species
None of these

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Growth and Nutrition of Bacteria
The equation used to obtain bacterial population by binary fission is

log(N/No) = nlog 2
All of these
log N/No = (0.3010) n
N = No2n

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