Video: Nyob rau hauv hom cell prokaryotes los yog eukaryotes puas cell voj voog tshwm sim Vim li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cell Cycle thiab Mitosis (hloov kho 2015) THE CELL CYCLE Cov cell voj voog , los yog cell - kev faib voj voog , yog series ntawm cov xwm txheej uas coj qhov chaw hauv a eukaryotic cell nruab nrab ntawm nws tsim thiab lub caij nws replicates nws tus kheej.
Ntawm no, nyob rau hauv hom cell prokaryotes lossis eukaryotes puas lub voj voog ntawm tes tshwm sim?
Cell kev faib yog ib feem ntawm lub neej lub voj voog ntawm txhua yam hlwb . Cell kev faib yog tus txheej txheem nyob rau hauv uas ib tug cell faib ua ob tug tshiab hlwb . Feem ntau prokaryotic hlwb faib los ntawm cov txheej txheem ntawm binary fission. Hauv eukaryotes , cell kev faib tshwm sim Hauv ob theem loj: mitosis thiab cytokinesis.
Kuj Paub, puas yog prokaryotes muaj lub voj voog ntawm tes? Cov pov thawj ntxiv qhia tias, hauv lwm yam prokaryotes , cov cell voj voog Nws yog qhov txawv ntawm eukaryotic paradigm. Kev pib ntawm chromosomal DNA replication nyob rau hauv eukaryotes yog tus cwj pwm los ntawm kev siv ntau yam replication keeb kwm, ua raws li los ntawm kev tiv thaiv ntawm reinitiation mus txog rau tom ntej. cell voj voog.
Tsuas yog li ntawd, nyob rau hauv hom cell --- prokaryotes lossis eukaryotes --- Puas yog lub voj voog ntawm tes tshwm sim Vim li cas?
Eukaryotes yog cov kab mob uas muaj hlwb muaj cov membrane-bound compartments hu ua organelles, xws li cov nucleus thiab mitochondria. Prokaryotes , ntawm qhov tod tes, ua tsis muaj cov khoom zoo li no. Yog li ntawd, cell faib tshwm sim me ntsis txawv hauv prokaryotes.
Vim li cas lub voj voog ntawm tes tshwm sim hauv eukaryotes?
Cov eukaryotic cell voj voog suav nrog plaub theem tsim nyog rau kev loj hlob thiab kev faib . Raws li ib tug cell txav los ntawm txhua theem, nws kuj dhau los ntawm ntau qhov chaw kuaj xyuas. Cov chaw kuaj xyuas no xyuas kom meej tias mitosis tshwm sim tsuas yog thaum ib puag ncig tej yam kev mob yog zoo siab thiab cellular genome muaj tau precisely replicated.
Pom zoo:
Yuav ua li cas cov txheej txheem ntawm cell faib nyob rau hauv eukaryotes feem ntau zoo ib yam li cell faib nyob rau hauv prokaryotes?
Tsis zoo li eukaryotes, prokaryotes (uas suav nrog cov kab mob) tau txais ib hom kev faib cell hu ua binary fission. Hauv qee qhov, cov txheej txheem no zoo ib yam li mitosis; Nws yuav tsum tau rov ua dua ntawm cov cell chromosomes, cais ntawm cov theej DNA, thiab kev sib cais ntawm niam txiv cell cytoplasm
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Dab tsi yog txhais los ntawm lub voj voog ntawm tes lossis cell division voj voog?
Cell Cycle thiab Mitosis (hloov kho 2015) LUB CELL CYCLE Lub voj voog ntawm tes, lossis lub voj voog ntawm tes faib, yog cov xwm txheej uas tshwm sim hauv lub cell eukaryotic ntawm nws qhov tsim thiab lub sijhawm nws rov ua dua nws tus kheej. Interphase yog nyob nruab nrab ntawm lub sijhawm thaum lub cell faib
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej
Vim li cas lub voj voog ntawm lub voj voog 2 pir?
2 thiab r tuaj vim nws sib npaug ntawm txoj kab uas hla. Yog li pi lub sij hawm 2 zaug r yog lub hauv paus ncig hla txoj kab uas hla lub sij hawm txoj kab uas hla uas muab ib ncig. Yog li ntawd yog qhov twg 2 * pi * r los ntawm