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10 Cards in this Set
- Front
- Back
Most of the fungi grow optimally between the pH,
a. 9.0-10.0 b. 4.0-5.0 c. 5.0-6.0 d. 7.0-8.0 |
5.0-6.0
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2. Microorganisms grow at the highest rate during,
a. Stationary phase b. Log phase c. Lag phase d. Death phase |
Log phase
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Which one of the following temperature can kill mesophile?
a. -50C b. 9C c. 60C d. 0C |
60C
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The term trace elements refers to,
a. vitamins b. The elements CNHOPS c. Nitrogen, Phosphorus d. Small mineral requirements |
Small mineral requirements
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The autotrophs are the organisms which,
a. Utilize CO2 as carbon source b. Utilize organic source of carbon c. Utilize chemicals as energy source. d. Both a and b. |
Utilize CO2 as carbon source
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Most bacteria grow between the pH,
a. 9.0-10.0 b. 4.0-5.0 c. 5.0-6.0 d. 6.0-8.0 |
d. 6.0-8.0
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7. High salt concentration kills bacteria by causing,
a. Osmolysis b. Plasmolysis c. Affecting respiration d. Changing pH |
a. Osmolysis
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Which one of the following is the indirect way of measuring growth?
a. Turbidity b. Plate count c. Filtration d. Microscopic count |
a. Turbidity
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Growth of anaerobic bacteria is inhibited by,
a. Nitrogen b. Sugar c. Sulfur d. Molecular oxygen |
Molecular oxygen
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Thermophiles grow between the temperature range,
a. –10C to 20C b. 40C to 72C c. 10C to 50C d. 0C to 30C |
b. 40C to 72C
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