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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
In the exponential phase, the cells and cell mass

first increases then decreases
double at a constant rate
decreases
are constant

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Growth and Nutrition of Bacteria
The organism which grows best above 45°C are called

thermophilic
any of these
psychrophilic
mesosphilic

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Growth and Nutrition of Bacteria
The reproduction by budding occur in

Both (a) and (b)
Bacillus subtilis
Hyphomicrobium vulgare
Rhodopseudomonas acidophila

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

20-30°C
>40°C
25-40°C
None of these

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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

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

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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

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

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