Video: Yuav ua li cas tshwm sim hauv S theem ntawm lub voj voog ntawm tes?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov S theem ntawm a cell voj voog tshwm sim Thaum lub sij hawm interphase, ua ntej mitosis los yog meiosis, thiab yog lub luag hauj lwm rau cov synthesis los yog replication ntawm DNA. Nyob rau hauv no txoj kev, genetic khoom ntawm a cell yog ob npaug ua ntej nws nkag mus rau mitosis lossis meiosis, tso cai kom muaj DNA txaus los faib ua tus ntxhais hlwb.
Nyob rau hauv txoj kev no, yuav ua li cas tshwm sim thaum lub sij hawm S theem ntawm lub cell quizlet?
Cov cell npaj rau kev faib thiab luam organelles. Dab tsi tshwm sim thaum lub sij hawm S ? Cov cell cov DNA yog theej nyob rau hauv tus txheej txheem ntawm DNA replication.
Ib tug kuj nug, vim li cas S theem ntawm lub voj voog ntawm tes yog qhov tseem ceeb rau kev faib cell? S theem , los yog synthesis, yog cov theem ntawm lub voj voog ntawm tes thaum DNA ntim rau hauv chromosomes replicated. Qhov kev tshwm sim no yog ib qho qhov tseem ceeb nam ntawm cell voj voog vim replication pub rau txhua tus cell tsim los ntawm cell faib kom muaj tib yam tshuaj genetic make-up.
Ntawm no, dab tsi tshwm sim hauv g2 theem ntawm lub voj voog ntawm tes?
Qhov kawg ntawm interphase yog hu ua G2 Phase . Cov cell tau loj hlob, DNA tau replicated, thiab tam sim no lub cell yuav luag npaj faib. Qhov kawg theem no yog tag nrho hais txog prepping lub cell rau mitosis los yog meiosis. Thaum lub sij hawm G2 Phase , cov cell yuav tsum loj hlob ib co ntxiv thiab tsim tej molecules nws tseem yuav tsum tau faib.
Dab tsi tshwm sim hauv g1 theem?
Cov G1 Phase feem ntau hu ua kev loj hlob theem , vim qhov no yog lub sijhawm uas lub cell loj hlob. Lub sijhawm no theem , lub cell synthesizes ntau yam enzymes thiab cov as-ham uas xav tau tom qab rau DNA replication thiab cell division. Cov G1 Phase kuj yog thaum cov hlwb tsim cov protein ntau.
Pom zoo:
Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?
Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules
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
Lub neej voj voog ntawm fern txawv ntawm lub neej voj voog ntawm moss li cas?
Qhov txawv: -- Mosses yog cov nroj tsuag uas tsis muaj vascular; ferns yog vascular. - Gametophyte yog lub cim tseem ceeb hauv mosses; sporophyte yog lub cim tseem ceeb hauv ferns. - Mosses muaj cov txiv neej thiab poj niam sib cais gametophytes; fern gametophytes muaj txiv neej thiab poj niam qhov chaw ntawm tib tsob nroj