Multiple Choice
In a closed system, how many generations are required for a single bacterial cell to produce a population of 256 cells, assuming each generation results in a doubling of cell number?
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10. Dynamics of Microbial Growth
Microbial Growth Curves in a Closed System
Multiple Choice
In the growth curve of a bacterial population, the bacteria are rapidly increasing in number during the:
A
Lag phase.
B
Exponential (log) phase.
C
Stationary phase.
D
Decline phase.
E
Boomer phase.
Verified step by step guidance1
Understand the bacterial growth curve, which consists of four main phases: lag phase, exponential (log) phase, stationary phase, and decline (death) phase.
In the lag phase, bacteria are adapting to their environment and preparing for growth, but there is little to no increase in cell number.
During the exponential (log) phase, bacteria are in optimal conditions for growth, leading to a rapid increase in population size. This is characterized by a constant and maximum growth rate.
In the stationary phase, the growth rate slows down and stabilizes as resources become limited and waste products accumulate, leading to a balance between cell division and cell death.
The decline (death) phase occurs when the number of dying cells exceeds the number of new cells being produced, leading to a decrease in the overall population.
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