10 Questions
Which phase of bacterial culture is characterized by the cells dividing and their number increasing by geometric progression with time?
Log phase
What is the average generation time for bacteria?
1-3 hours
How many generations does it take for one cell of E. coli to become one million cells?
Approximately 20 generations (7 hours)
Which phase of bacterial culture is characterized by nutrients becoming limited or waste products becoming toxic?
Stationary phase
What is the relationship between the death rate and division rate in bacterial culture?
They are equal
Which of the following statements is true regarding the increase in number of cells in bacterial culture?
The cell size does not increase
What is the average generation time for bacteria?
1-3 hours
How many generations does it take for one cell of E. coli to become one million cells?
20 generations
Which phase of bacterial culture is characterized by making new enzymes in response to a new medium?
Lag phase
What is the relationship between the death rate and division rate in bacterial culture?
Death rate is equal to division rate
Study Notes
Bacterial Culture Phases
- The log phase is characterized by cells dividing and their number increasing by geometric progression with time.
- The average generation time for bacteria is 20-30 minutes.
Bacterial Growth
- It takes around 20 generations for one cell of E. coli to become one million cells.
- The number of cells in bacterial culture increases exponentially.
Stationary Phase
- The stationary phase is characterized by nutrients becoming limited or waste products becoming toxic.
- In this phase, the death rate equals the division rate.
Lag Phase
- The lag phase is characterized by the production of new enzymes in response to a new medium.
Death Rate and Division Rate
- The death rate and division rate are equal in the stationary phase.
- The death rate is less than the division rate in the log phase.
Test your knowledge of general veterinary bacteriology with this quiz! Learn about the increase in cell numbers, generation time for bacteria, and the lag phase in bacterial growth. Challenge yourself with multiple-choice questions and expand your understanding of these important concepts.
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