Podcast
Questions and Answers
During which phase does the number of cells increase as an exponential function of 2n?
During which phase does the number of cells increase as an exponential function of 2n?
- Log phase (correct)
- Lag phase
- Death or decline phase
- Stationary phase
At what pH range do acidophiles typically thrive?
At what pH range do acidophiles typically thrive?
- Below pH 5.5 (correct)
- At pH 6 – 8
- Above pH 8
- Around pH 7
Which type of microbe requires oxygen for growth and survival?
Which type of microbe requires oxygen for growth and survival?
- Aerotolerant anaerobe
- Aerobes (correct)
- Obligate Anaerobes
- Facultative anaerobes
What is the term for an organism that tolerates the presence of oxygen but does not utilize it?
What is the term for an organism that tolerates the presence of oxygen but does not utilize it?
At what temperature range do thermophiles thrive?
At what temperature range do thermophiles thrive?
What is the definition of microbial growth?
What is the definition of microbial growth?
What is a colony in microbiology?
What is a colony in microbiology?
What is the normal reproductive method of bacteria?
What is the normal reproductive method of bacteria?
What does generation time refer to in microbiology?
What does generation time refer to in microbiology?
What factors does the generation time depend upon?
What factors does the generation time depend upon?
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Study Notes
Microbial Growth and Characteristics
- The number of cells increases as an exponential function of 2n during the logarithmic phase.
- Acidophiles thrive in a pH range that is typically acidic.
- Aerobes are the type of microbe that requires oxygen for growth and survival.
- Facultative anaerobes are organisms that tolerate the presence of oxygen but do not utilize it.
Microbial Environment and Reproduction
- Thermophiles thrive in a temperature range that is typically high.
- Microbial growth is defined as an increase in the number of cells or increase in cellular components.
- A colony in microbiology refers to a group of cells that originate from a single cell.
- The normal reproductive method of bacteria is binary fission.
- Generation time refers to the time required for a cell to divide and form two new cells.
- The generation time depends on factors such as nutrient availability, temperature, pH, and oxygen availability.
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