Video: MPF ua dab tsi hauv mitosis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Maturation-promoting factor (abbreviated MPF , kuj hu mob mitosis -kev txhawb nqa lossis M-Phase-kev txhawb nqa) yog lub cyclin-Cdk complex uas tau pom thawj zaug hauv Qav qe. Nws stimulates lub mitotic thiab meiotic theem ntawm lub voj voog ntawm tes.
Ntxiv rau qhov no, yuav ua li cas rau MPF thaum lub sij hawm mitosis?
Ib txoj hauv kev tau qhib los ntawm MPF yog ib qho enzyme uas rhuav tshem cyclin. Yog li ntawd mob mitosis tau txais txoj hauv kev, cov enzyme uas rhuav tshem cyclin yog qhib, thiab qib ntawm cyclin pib poob. Raws li MPF theem poob, yog li ua haujlwm ntawm cov enzyme uas rhuav tshem cyclin.
Kuj Paub, MPF lub luag haujlwm yog dab tsi hauv lub voj voog ntawm tes? Maturation txhawb nqa ( MPF ) yog a cell voj voog checkpoint uas tswj kev hla ntawm a cell los ntawm G2 theem kev loj hlob mus rau theem M. Zoo li feem ntau cell voj voog chaw kuaj mob, MPF yog ib tug complex ntawm cov proteins uas yuav tsum muaj nyob ua ke ua ntej lub cell tuaj yeem txav los ntawm ib theem mus rau lwm qhov.
Ntxiv mus, mitosis txhawb MPF ua haujlwm li cas?
mob mitosis - txhawb nqa ( kev loj hlob - txhawb nqa ; MPF ) Cov protein complex lub luag hauj lwm rau triggering mob mitosis nyob rau hauv somatic hlwb thiab rau kev loj hlob oocytes rau hauv cov qe qe. Qib ntawm cyclins thiab MPF nce raws li lub cell nkag mob mitosis , mus txog lub ncov thaum mob mitosis , thiab ces poob thaum anaphase.
Yuav ua li cas MPF tso cai rau lub cell kom dhau g2 theem?
Tus nqi txaus ntawm MPF yuav tsum muaj rau lub cell kom dhau G2 chaw kuaj mob; Qhov no tshwm sim los ntawm tsub zuj zuj ntawm cyclin proteins uas ua ke nrog Cdk rau daim ntawv MPF.
Pom zoo:
S sawv rau dab tsi thiab dab tsi tshwm sim hauv theem no?
S theem sawv rau 'Synthesis'. Qhov no yog theem thaum DNA replication tshwm sim. The G2 stage stands for 'GAP 2'
Dab tsi yog qhov cuam tshuam ntawm mitosis hauv lub cell uas tau kho nrog colchicine?
Piav txog cov teebmeem ntawm mitosis hauv lub cell uas tau kho nrog colchicine. Thaum lub cell raug kho nrog colchicine, spindle fibers yuav tsis tsim kom raug. Yog li cov chromosomes yuav tsis tuaj yeem muab faib kom raug lossis hloov mus rau txoj haujlwm tsim nyog hauv kev faib cell
Cov kauj ruam ntawm mitosis yog dab tsi thiab dab tsi tshwm sim hauv txhua qhov?
Mitosis muaj tsib theem sib txawv: interphase, prophase, metaphase, anaphase thiab telophase. Cov txheej txheem ntawm cell faib tsuas yog ua tiav tom qab cytokinesis, uas tshwm sim thaum lub sij hawm anaphase thiab telophase. Txhua theem ntawm mitosis yog tsim nyog rau cell replication thiab faib
Dab tsi yog tus lej chromosome ntawm niam txiv lub hlwb hauv mitosis?
Tom qab mitosis ob lub hlwb zoo tib yam tsim nrog tib tus naj npawb ntawm chromosomes, 46. Haploid hlwb uas tsim los ntawm meiosis, xws li qe thiab phev, tsuas muaj 23 chromosomes, vim hais tias, nco ntsoov, meiosis yog 'txo faib.'
Dab tsi tshwm sim hauv txhua theem ntawm mitosis?
Mitosis yog cov txheej txheem uas cov nucleus ntawm eukaryotic cell faib. Thaum lub sijhawm txheej txheem no, tus muam chromatids cais tawm ntawm ib leeg thiab txav mus rau cov ncej ntawm tes. Qhov no tshwm sim nyob rau hauv plaub theem, hu ua prophase, metaphase, anaphase, thiab telophase