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Growth and Nutrition of Bacteria

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

aerotolerant anaerobe
acidophile
neutrophile
osmotolerant

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Growth and Nutrition of Bacteria
Generation time of Escherichia coli is

20 minutes
20 days
200 hours
20 hours

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

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

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Growth and Nutrition of Bacteria
Which of the following is used to grow bacterial cultures continuously?

Hemostat
Coulter Counter
Chemostat
Petroff-Hausser chamber

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Growth and Nutrition of Bacteria
All organisms require at least small amounts of carbondioxide, However, some can use CO2 as their sole source of carbon. Such organisms are termed as

chemotrophs
phototrophs
autotrophs
photo-organotrophs

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Growth and Nutrition of Bacteria
Exponential phase of growth curve of bacteria is of limited duration because of

exhaustion of nutrients
rise in cell density
accumulation of toxic metabolites
all of these

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