1. DNA Replication: The bacterial chromosome, a single circular molecule of DNA, replicates. This creates two identical copies.
2. Cell Growth: The cell elongates, increasing its volume and surface area. This prepares for division.
3. Cell Wall Formation: A new cell wall forms between the two copies of DNA, separating the cytoplasm into two distinct compartments.
4. Cytokinesis: The cell membrane pinches inwards, eventually dividing the cell into two identical daughter cells.
Important Note: Yersinia pestis can exist in two forms:
* Coccobacillus: This is the typical rod-shaped form that divides through binary fission.
* Capsule: Under certain conditions, Yersinia pestis can form a capsule around itself. This form does not actively divide but is more resistant to environmental factors.
Factors that influence reproduction:
* Temperature: Optimal growth occurs at 28°C (82°F).
* Nutrition: Yersinia pestis requires specific nutrients for growth and reproduction.
* Oxygen: Yersinia pestis can survive in both aerobic and anaerobic environments.
Key takeaway: Yersinia pestis reproduces primarily through binary fission, a process that allows for rapid multiplication and the potential to cause widespread infection.
