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Aug 31, 2023 · 3. The stationary growth phase. Here the population grows slowly or stops growing (see Figure 17.1.3 17.1. 3) because of decreasing food, increasing waste, and lack of space. The rate of replication is balanced out by the rate of inhibition or death. 4. The decline or death phase.
Oct 23, 2024 · The log phase, or exponential phase, is characterized by rapid cell division and population growth. During this period, bacteria divide at a constant rate, leading to an exponential increase in cell numbers. This phase is marked by optimal conditions where nutrients are abundant, and waste products are minimal, allowing for maximum growth ...
Jul 18, 2022 · Figure 8.1.4 8.1. 4: The growth curve of a bacterial culture is represented by the logarithm of the number of live cells plotted as a function of time. The graph can be divided into four phases according to the slope, each of which matches events in the cell. The four phases are lag, log, stationary, and death.
The bacterial chromosome is attached to the plasma membrane at about the midpoint of the cell. The starting point of replication, the origin, is close to the binding site of the chromosome to the plasma membrane (Figure 10.1.1 10.1. 1). Replication of the DNA is bidirectional, moving away from the origin on both strands of the loop simultaneously.
Aug 14, 2017 · For exponential growth during the cell cycle (cells incorporate material at a rate that is proportional to their size), the average mass-doubling time does not depend on average cell size ...
- Lisa Willis, Lisa Willis, Kerwyn Casey Huang
- 2017
Apr 16, 2015 · A constant size extension drives bacterial cell size homeostasis. Cell 159 1433–1446 10.1016/j.cell.2014.11.022 [PMC free article] [Google Scholar] Cooper S. (2006). Distinguishing between linear and exponential cell growth during the division cycle: single-cell studies, cell-culture studies, and the object of cell-cycle research.
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The enlarged view shows the square within which bacteria (red cells) are counted. If the coverslip is 0.2 mm above the grid and the square has an area of 0.04 mm 2, then the volume is 0.008 mm 3, or 0.000008 mL. Since there are 10 cells inside the square, the density of bacteria is 10 cells/0.000008 mL, which equates to 1,250,000 cells/mL.
