The Cell Cycle #10 (pt 1 Binary Fission)

Cell cycle

• Def: Cycle of how cells reproduce and multiply

• Steps:

  • 1) copying of genetic information

  • 2) distribution of copies to daughter cells

  • 3) growth of the daughter cell following cell division

1) copying of genetic information, 2) distribution of copies to daughter cells, 3) growth of the daughter cells following cell division

Cell cycle steps

Cell division

• Def: the creation of daughter cells from a parent/mother cell

the creation of daughter cells from a parent/mother cell

Cell division definition:

Binary fission

• Def: The separation of a single parent prokaryotic cell into two identical daughter cells

• Cell cycle that Prokaryotes undergo

• Steps:

  • 1) complete copying of all DNA

  • 2) separation of copied DNA to opp ends of the cell

  • 3) splitting of the single cell into two new cells

The separation of a single parent prokaryotic cell into two identical daughter cells

Binary fission definition:

1) complete copying of all DNA, 2) separation of copied DNA to opp ends of the cell, 3) splitting the single cell into two new cells

Steps of Binary fission:

Origin of Replication for Prokaryotes

• Def: where the process of DNA replication begins

• a special section of the prokaryote DNA single ring-formation chromosome

DNA replication in Binary fission

• Prokaryote DNA is replicated

• Plasmids are replicated (have their own origin of replication region)

• the cell continues to grow throughout the replication process

Post DNA replication in Binary fission

• When DNA replication is complete:

  • 1) the DNA and plasmids move/are moved to opposite ends of the cell (we dont know how this happens yet)

    • the cell continues to grow throughout the replication process

  • 3) Once cell is large enough & DNA/plasmids are separated the plasma membrane begins to pinch together through the middle of the cell

  • 4) cell wall is deposited over the membrane as it splits the cellls

two identical daughter cells, one with the original chromosome and one with a newly-replicated chromosome

End result of Binary fission: