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Questions and Answers
What are the physical requirements for microbial growth?
What are the physical requirements for microbial growth?
- Temperature and osmotic pressure
- Temperature and pH (correct)
- pH and osmotic pressure
- pH and water availability
At what temperature do thermophiles, specifically hyperthermophiles, have their optimum growth?
At what temperature do thermophiles, specifically hyperthermophiles, have their optimum growth?
- 50-60⁰C
- 121⁰C and above
- 80°C or higher (correct)
- 25–40°C
In what pH range do most bacteria grow best?
In what pH range do most bacteria grow best?
- Above pH 8
- Below pH 4
- Between pH 4 and 5
- Between pH 6.5 and 7.5 (correct)
Which type of microbes are cold-loving microbes?
Which type of microbes are cold-loving microbes?
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What is the term for the shrinkage of cell cytoplasm due to a hypertonic environment?
What is the term for the shrinkage of cell cytoplasm due to a hypertonic environment?
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Which microorganisms can grow in or tolerate saline conditions?
Which microorganisms can grow in or tolerate saline conditions?
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What type of microbes are unable to use molecular oxygen for energy-yielding reactions?
What type of microbes are unable to use molecular oxygen for energy-yielding reactions?
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What is the process by which one cell eventually separates to form two cells?
What is the process by which one cell eventually separates to form two cells?
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Which element is not listed as a chemical requirement for microbes?
Which element is not listed as a chemical requirement for microbes?
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