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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Bacteria of genus Nitrosomonas use __________ as their electron source.

light
succinate
H2S
ammonia

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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?

Hemostat
Trubidostat
Coulter Counter
Petroff-Hausser chamber

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Growth and Nutrition of Bacteria
A synergistic effect is observed when

one organism produces a growth factor utilized by another
microbial alteration of pH, aw, Eh favours the growth of another
All of these
one organism removes an inhibitory substance for another

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Growth and Nutrition of Bacteria
The generation time of a culture that produces two generations per hour is

equal to that produces three generations per hour
greater than that produces three generations per hour
None of these
lesser than that produces three generations per hour

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Growth and Nutrition of Bacteria
The term facultative anaerobe refers to an organism that

requires less oxygen than is present in air
doesn't use oxygen but tolerates it
is killed by oxygen
uses oxygen when present or grows without oxygen when absent

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Growth and Nutrition of Bacteria
What is the primary source of food for marine life?

Phytoplankton
Grass
Sea weed
Zooplankton

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