Dna Biology

February 28, March 1 Meiosis leads to the business of sperm and peltgametes Mitosis leads to the production of somatic cells body belonging Mitosis and Cell perpetual 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 about consists of a single DNA that is wrapped some proteins . Interphase vs Mitosis phase Interphase is an kl active time; cell is either growth and preparing to ramify or fulfilling its spi,./ecialized its specialized function in a cellular individualnondividing pahse M phase- dividing phase S pahse- reappearance of genetic fabric is separated Control of the cell rhythm Before cells enter M, phase, there is a regulative mite that helps cells go into M phase from G2 phase. The regulatory molecule is called MPF Mitosis Promoting cypher Made up of 2 distinct polyp eptide 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 initiate by phosphorylation at two sites and is activated by dehosphorylation at one site.

Checkpoints cell cycle fudge G1 checkpoint- Size, if the cells are too small the its daughter cells usage be fucked so it wont 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 early(a) cells vilify to P53- If Dna is damage, th! en 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 given over properly to the spindle apparatus, M phase arrests at metaphase. G1 also prevents the growth of mature cells by putting them into a g0...If you require to get a adept essay, order it on our website: OrderCustomPaper.com

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