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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Which of the following procedures uses a photocell to measure absorbance of a culture to regulate the flow of culture media?

Coulter Counter
Trubidostat
Hemostat
Petroff-Hausser chamber

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Growth and Nutrition of Bacteria
The reproduction by budding occur in

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

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Growth and Nutrition of Bacteria
Microaerophilic bacteria are those which require

None of these
21 % oxygen for growth
low levels of oxygen for growth (lesser than O2 present in atmosphere)
oxygen for activation of enzymes

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Growth and Nutrition of Bacteria
The organism which obtain their energy from chemicals are designated as

organotrophs
autotrophs
chemotrophs
prototrophs

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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
Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as

chemo-lithotrophs
chemotrophs
fastidious hetrotrophs
photo-organotrophs

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