Biology Chapter 11 Cell Division: 11.1 A) Cell Division Cell Division: the process by which a single cell becomes two daughter cells Prokaryotic cells divide by binary fission Eukaryotic cells divide by Mitosis and Cytokinesis Ori = Origin of replication (code for replication ) B) Binary Fission FtsZ, a protein it encodes forms a ring at the site of constriction where the new cell wall forms between the two daughter cells (very similar to Tublin) Cell Division in bacteria and archaeon?s occurs by binary fission Together, mitosis and cytokinesis are known as mitotic cell division. M phase (mitosis and cytokinesis) alternates with interphase, which consists of G1, S (synthesis), and G2?phases. These four stages together constitute the cell cycle.