Video: Cov kab mob puas muaj cov ntsiab lus hloov pauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev sau ntawv yog ua los ntawm RNA polymerase tab sis nws qhov tshwj xeeb yog tswj los ntawm cov kab ke tshwj xeeb DNA khi cov proteins hu ua cov ntsiab lus ntawm kev txhais lus . Kab mob vam khom heev kev sau ntawv thiab kev txhais lus los tsim cov proteins uas pab lawv teb tshwj xeeb rau lawv ib puag ncig.
Kuj kom paub yog, qhov twg yog qhov transcription yam pom?
Transcription yam yog ib tsev neeg muaj protein ntau ntau thiab feem ntau ua haujlwm hauv ntau subunit protein complexes. Lawv tuaj yeem khi ncaj qha rau cov cheeb tsam tshwj xeeb "txhim kho" ntawm DNA, uas nyob rau sab saud ntawm thaj chaw coding hauv cov noob, lossis ncaj qha rau RNA polymerase molecule.
Ib tug kuj yuav nug, dab tsi yog lub luag haujlwm tseem ceeb ntawm kev hloov pauv? Hauv molecular biology, a transcription factor (TF) (los yog ib ntus tshwj xeeb DNA-binding yam ) yog cov protein uas tswj tus nqi ntawm kev sau ntawv ntawm cov ntaub ntawv caj ces los ntawm DNA mus rau tus tub txib RNA, los ntawm kev khi rau ib qho DNA ib ntus.
Kuj paub, dab tsi yog qhov kev hloov pauv dav dav thiab lawv ua haujlwm li cas?
A transcription factor yog ib qho protein uas khi rau DNA ib ntus (txhim kho lossis txhawb nqa), ib leeg lossis nrog lwm cov proteins hauv qhov nyuaj, rau tswj tus nqi ntawm kev sau ntawv cov ntaub ntawv genetic los ntawm DNA rau neeg xa xov liaison RNA los ntawm kev txhawb nqa (ua haujlwm ua haujlwm) lossis thaiv (ua haujlwm raws li tus neeg tawm tsam)
Cov kab mob puas muaj cov tshuaj tiv thaiv?
Ib zaug xav tias nws yog tshwj xeeb rau eukaryotes, ua kom zoo -zoo li cov ntsiab lus muaj tau pom nyob rau hauv ntau yam ntawm kab mob . Cov kev tswj hwm cov proteins uas khi rau cov no Cov kab mob ua kom zoo yuav tsum hu rau RNA polymerase kom qhib cov ntawv sau. Paradigms rau txhua txoj hauv kev no muaj nyob hauv kab mob tshuab.
Pom zoo:
Cov kab mob puas kis cov kab mob eukaryotic?
Ib lub cell uas muaj kab mob ua rau cov kab mob kis tau ntau dua thiab cov khoom siv caj ces es tsis yog nws cov khoom qub. Qee cov kab mob yuav nyob twj ywm hauv cov tswv tsev rau lub sijhawm ntev, ua rau tsis muaj kev hloov pauv hauv lawv cov tswv tsev (ib theem hu ua lysogenic theem). Cov kab mob ua rau muaj ntau yam kab mob hauv eukaryotes
Cov hlau hloov pauv puas muaj cov ntsiab lus melting tsawg?
Cov ntsiab lus melting-cov ntsiab lus ntawm cov hlau hloov pauv yog siab vim 3d electrons muaj rau cov hlau sib txuas. Qhov ntom ntawm cov hlau hloov pauv yog siab rau tib yam li cov ntsiab lus kub kub. Cov hlau hloov pauv yog tag nrho cov hlau ntom ntom nrog cov ntsiab lus siab melting thiab kub kub
Cov kab mob twg muaj cov kab mob eukaryotic?
Cov kab mob thiab Archaea tsuas yog prokaryotes. Cov kab mob uas muaj eukaryotic hlwb hu ua eukaryotes. Tsiaj txhu, nroj tsuag, fungi, thiab protists yog eukaryotes. Tag nrho cov kab mob multicellular yog eukaryotes
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces
Dab tsi yog kev hloov pauv hauv cov kab mob muaj sia?
Variation, nyob rau hauv biology, txhua qhov sib txawv ntawm cov cell, tib neeg cov kab mob, los yog ib pawg ntawm cov kab mob ntawm ib hom kab mob tshwm sim los ntawm kev sib txawv ntawm caj ces (genotypicvariation) los yog los ntawm cov nyhuv ntawm ib puag ncig yam uas qhia txog kev muaj peev xwm ntawm caj ces (phenotypicvariation)