Dna Biology

February 28, March 1 Meiosis leads to the business of sperm and clumpgametes Mitosis leads to the production of somatic cells clay belonging Mitosis and Cell fixing recurrence Growth- trillions of genetically identical cells that suffer up our body Wound repair- scrape, mitosis and cytokinesis generate cells that repair your skin Reproduction- production of genetically identical cells chromo several(prenominal) consists of a single DNA that is wrapped some proteins . Interphase vs Mitosis phase Interphase is an kl active time; cell is either ontogenesis and preparing to ramify or fulfilling its spi,./ecialized its specialized function in a cellular individualnondividing pahse M phase- dividing phase S pahse- takings of genetic fabric is separated Control of the cell round Before cells enter M, phase, there is a regulative pinch that helps cells go into M phase from G2 phase. The regulatory molecule is called MPF Mitosis Promoting compute Made up of 2 d istinct polypeptide subunits Protein Kinase- and enzyme that catalyzes the carry-over of orthophosphate group from ATP to a target protein--CDK So MPF phosphorylates a protein that triggers mitosis Other subunit is called Cyclin MPF is in mad by phosphorylation at two sites and is activated by dehosphorylation at one site.

Checkpoints cell cycle controller G1 checkpoint- Size, if the cells are too small the its daughter cells usage be fucked so it use return the checkpoint Availability of nutrients- if not nutrients it wont replicate Social signals- the pass or dont pass through g1 phase in response to another(prenominal) cells vilify to P53-! If Dna is disgraced, then the protein p53 activates apoptosis G2 Checkpoint- if DNA is damaged or chromosomes are not replicated correctly then MPFs dephosphorylation is blocked Final Checkpoint- Metaphase checkpoint If not all chromosomes are devoted properly to the spindle apparatus, M phase arrests at metaphase. G1 in like manner prevents the growth of mature cells by putting them into a g0...If you necessitate to get a adept essay, order it on our website: OrderCustomPaper.com

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