LIFESCI 7A Lecture Notes - Lecture 12: Ftsz, Cell Division, Cytokinesis
Document Summary
Week 8 notes: cell cycle and dna replication. Daughter cells receive cull genetic material in single parent cell. Parent cell must be large enough to divide in two and contribute enough cytoplasmic components. Eukaryotes--mitosis and then cytokinesis (cytoplasm divides into two cells) Cell replicated dna, increases in size, divides in two. This process is similar in chloroplasts and mitochondria. Ftsz encodes for proteins that assemble at site of constriction--important for cell division; seems to be evolutionarily related to tubulin. Breakdown and then re-formation of the nuclear envelope. Chromosomes attaching to mitotic spindle, which separates them into daughter cells. Some unicellular eukaryotes have characteristics of both binary ssion and mitosis. Cell cycle describes life cycle of eukaryotic cell: m phase. Many preparations for dividing--replication of dna, increase in cell size. G0 phase--some cells stay between m and s phase for days or even years. Nerve and some eye cells are in g0 permanently.
