Podcast
Questions and Answers
Which method is used to measure population size when dealing with a large population?
Which method is used to measure population size when dealing with a large population?
- Turbidity
- Streaking
- Membrane filtration
- Serial dilutions (correct)
What happens to the inoculum during streaking across the agar plate?
What happens to the inoculum during streaking across the agar plate?
- It is diluted (correct)
- It is filtered
- It is concentrated
- It is incubated
What is the purpose of streaking the inoculum across successive areas of the plate?
What is the purpose of streaking the inoculum across successive areas of the plate?
- To dilute the inoculum (correct)
- To concentrate the inoculum
- To filter the inoculum
- To incubate the inoculum
Which method is used to measure population size when dealing with a small population?
Which method is used to measure population size when dealing with a small population?
What does the membrane filter retain during population size measurement?
What does the membrane filter retain during population size measurement?
What is done with the membrane filter after it retains the cells?
What is done with the membrane filter after it retains the cells?
What is the purpose of turbidity measurement in population size estimation?
What is the purpose of turbidity measurement in population size estimation?
Which method is used for measuring population size when dealing with large populations indirectly?
Which method is used for measuring population size when dealing with large populations indirectly?
What is the purpose of incubation in population size measurement?
What is the purpose of incubation in population size measurement?
Which of the following is NOT a characteristic of biofilms?
Which of the following is NOT a characteristic of biofilms?
What is the purpose of agar in solid media?
What is the purpose of agar in solid media?
Which type of media contains substances that either favor the growth of particular microorganisms or inhibit the growth of unwanted ones?
Which type of media contains substances that either favor the growth of particular microorganisms or inhibit the growth of unwanted ones?
What is the purpose of differential media?
What is the purpose of differential media?
What is the main purpose of the streak plate method?
What is the main purpose of the streak plate method?
What is the key requirement for a pure culture?
What is the key requirement for a pure culture?
What is the purpose of the Durham tube in carbohydrate utilization tubes?
What is the purpose of the Durham tube in carbohydrate utilization tubes?
During which phase of the microbial growth curve do cells grow at their maximum rate and there are no limitations to nutrients?
During which phase of the microbial growth curve do cells grow at their maximum rate and there are no limitations to nutrients?
What happens during the stationary phase of the microbial growth curve?
What happens during the stationary phase of the microbial growth curve?
What is the equation used to calculate the log10 number of viable cells at a given time (Nt)?
What is the equation used to calculate the log10 number of viable cells at a given time (Nt)?
What is the lag phase of the microbial growth curve?
What is the lag phase of the microbial growth curve?
When does the microbial growth curve reach the long-term stationary phase?
When does the microbial growth curve reach the long-term stationary phase?
What happens during the death phase of the microbial growth curve?
What happens during the death phase of the microbial growth curve?
What is the effect of dying cells releasing nutrients during the long-term stationary phase?
What is the effect of dying cells releasing nutrients during the long-term stationary phase?
Which of the following is true about generation time?
Which of the following is true about generation time?
What is the generation time for Escherichia coli at 37°C?
What is the generation time for Escherichia coli at 37°C?
Which of the following organisms has the shortest generation time?
Which of the following organisms has the shortest generation time?
Which of the following factors affects microbial growth?
Which of the following factors affects microbial growth?
Which of the following pH ranges is considered acidic?
Which of the following pH ranges is considered acidic?
Which of the following temperature ranges is suitable for the growth of psychrophiles?
Which of the following temperature ranges is suitable for the growth of psychrophiles?
Which of the following organisms is an obligate anaerobe?
Which of the following organisms is an obligate anaerobe?
