Podcast
Questions and Answers
Which of the following is a characteristic that effects microbial growth?
Which of the following is a characteristic that effects microbial growth?
- Chemical and physical factors (correct)
- Continuous culture
- Reproductive strategies
- Binary fission
What is the purpose of a dilution series in measuring bacterial growth?
What is the purpose of a dilution series in measuring bacterial growth?
- To identify the growth phases
- To measure the viable count (correct)
- To determine the lag phase
- To estimate the cell count
In a continuous culture, what happens to the culture when fresh medium is trickled in at a steady rate?
In a continuous culture, what happens to the culture when fresh medium is trickled in at a steady rate?
- The culture reaches the death phase
- The culture enters the stationary phase
- The culture remains in the exponential phase (correct)
- The culture undergoes binary fission
What is the reproductive strategy of bacteria and archaea?
What is the reproductive strategy of bacteria and archaea?
What is the reproductive strategy of eukaryotic microbes?
What is the reproductive strategy of eukaryotic microbes?
What is the purpose of a chemostat or turbidostat in continuous culture?
What is the purpose of a chemostat or turbidostat in continuous culture?
When should you inoculate the bacteria in the laboratory experiment?
When should you inoculate the bacteria in the laboratory experiment?
What must bacteria and archaea do prior to division?
What must bacteria and archaea do prior to division?
Which phase of bacterial growth is characterized by cells dividing repeatedly at their maximal rate?
Which phase of bacterial growth is characterized by cells dividing repeatedly at their maximal rate?
Which method of counting bacteria is typically carried out by a dilution series and counting only plates with 30-300 colonies?
Which method of counting bacteria is typically carried out by a dilution series and counting only plates with 30-300 colonies?
Which optical technique can be used to estimate cell numbers accurately by measuring visible turbidity?
Which optical technique can be used to estimate cell numbers accurately by measuring visible turbidity?
What is the formula to calculate final number of Cells?
What is the formula to calculate final number of Cells?
What is the purpose of the lag phase in bacterial growth?
What is the purpose of the lag phase in bacterial growth?
What is the main reason for the death phase in bacterial growth?
What is the main reason for the death phase in bacterial growth?
Which technique can be used to count cells directly and give an accurate number, but cannot distinguish between living and dead cells?
Which technique can be used to count cells directly and give an accurate number, but cannot distinguish between living and dead cells?
In continuous culture using a chemostat, what controls the microbial growth rate?
In continuous culture using a chemostat, what controls the microbial growth rate?
Which of the following is NOT considered a psychrophile?
Which of the following is NOT considered a psychrophile?
Which of the following is a characteristic of thermophiles?
Which of the following is a characteristic of thermophiles?
Which of the following types of organisms can grow equally well with or without oxygen?
Which of the following types of organisms can grow equally well with or without oxygen?
Where are biofilms most commonly found?
Where are biofilms most commonly found?
What is the term for the density-dependent communication between bacterial cells in biofilms?
What is the term for the density-dependent communication between bacterial cells in biofilms?
What is the autoinducer molecule produced by many gram-negative organisms in quorum sensing?
What is the autoinducer molecule produced by many gram-negative organisms in quorum sensing?
Which of the following is NOT a factor that may affect microbial growth?
Which of the following is NOT a factor that may affect microbial growth?
Which of the following is a characteristic of mesophiles?
Which of the following is a characteristic of mesophiles?
Which of the following is a characteristic of facultative anaerobes?
Which of the following is a characteristic of facultative anaerobes?
