Multiple Choice
In a typical microbial growth curve in a closed system, the log phase is also referred to as which of the following phases?
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10. Dynamics of Microbial Growth
Microbial Growth Curves in a Closed System
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The log phase of the bacterial growth curve is marked by
A
A decrease in cell mass.
B
Dormant, metabolically inactive cells.
C
Viable cells dying.
D
Vigorously dividing cells.
Verified step by step guidance1
Understand the bacterial growth curve, which consists of four phases: lag, log (exponential), stationary, and death.
Recognize that the log phase is characterized by rapid cell division and population growth, where cells are actively dividing and increasing in number.
During the log phase, the rate of cell division is constant, and the population doubles at regular intervals, leading to exponential growth.
Identify that the log phase is not associated with a decrease in cell mass, dormant cells, or dying cells, but rather with vigorous cell division and metabolic activity.
Conclude that the correct description of the log phase is 'vigorously dividing cells,' as this phase is marked by active growth and reproduction.
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