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Growth and Nutrition of Bacteria

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

chemotrophs
organotrophs
prototrophs
autotrophs

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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
Salmonella
C. botulinum
S. aureus

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

Grass
Zooplankton
Phytoplankton
Sea weed

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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
autotrophs
phototrophs
photo-organotrophs

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Growth and Nutrition of Bacteria
A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the

organism should be grown in an anaerobic chamber
organism can tolerate oxygen
organism cannot produce superoxide dismutase and/or catalase
broth is sterile

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

25-40°C
>40°C
20-30°C
None of these

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