Bio 1000: Cell Cycle in Prokaryotes

CELL CYCLE

The entire mechanism of prokaryotic cell division called BINARY FISSION: splitting or dividing into two parts. Three periods:

1. Growth before initiating DNA synthesis called B period
2. Chromosomes are replicated and separated to opposite ends of the cell called C period
3. Membrane pinches together between them and two daughter cells are formed called D period

All chromosomes are compacted into a central region called the NUCLEOID throughout the cell cycle

PROCESS OF BINARY FISSION

1. Replication of bacterial chromosome starts at the specific region called the origin of replication
2. Once the ori has been duplicated, the two new origins migrate toward the two opposite ends of the cell
3. Cytoplasmic division is associated with an inward constriction of a CYTOKINETIC RING of cytoskeletal proteins