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Video: Dab tsi yog qhov yuam kev hauv DNA replication hu ua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov yuam kev hauv DNA Replication
Qhov sib ntxiv ntawm lub hauv paus tsis raug tuaj yeem tshwm sim los ntawm tus txheej txheem hu ua tautomerization. Ib tug tautomer ntawm ib pab pawg hauv paus yog ib qho kev hloov me ntsis ntawm nws cov electrons uas tso cai rau cov qauv sib txawv ntawm cov hauv paus. Qhov no tuaj yeem ua rau qhov tsis raug ua ke ntawm C nrog A tsis yog G, piv txwv li.
Tsuas yog li ntawd, yuav ua li cas yog tias muaj qhov yuam kev hauv DNA replication?
yuam kev thaum Rov ua dua . DNA replication yog cov txheej txheem muaj tseeb heev, tab sis yuam kev muaj peev xwm qee zaus tshwm sim li thaum a DNA polymerase inserts lub hauv paus tsis ncaj ncees lawm. Tsis raug yuam kev Tej zaum yuav ua rau muaj qhov tshwm sim loj, xws li mob qog noj ntshav. Hloov pauv: Hauv qhov kev sib tham sib tham no, koj tuaj yeem "kho" a DNA strand thiab ua rau muaj kev hloov pauv.
Tsis tas li, leej twg kho qhov yuam kev hauv DNA replication? A DNA polymerase Tom qab ntawd hloov cov seem uas ploj lawm nrog cov nucleotides raug, thiab ib qho enzyme hu ua a DNA ligase seals qhov sib txawv 2. Mismatch kho . Ib qho tsis sib haum yog kuaj pom nyob rau hauv tshiab synthesized DNA.
Xav txog qhov no, dab tsi yog qhov yuam kev hauv DNA replication?
High precision (fidelity) ntawm DNA replication Nws yog ib qho tseem ceeb rau cov hlwb los khaws cov noob caj noob ces thiab tiv thaiv kev sib sau ntawm cov kev hloov pauv tsis zoo. Cov yuam kev tus nqi thaum DNA replication yog tsawg li 10−9 rau 10−11 yuam kev rau base khub.
Yuav ua li cas thaum lub hauv paus khub mismatched?
Hauv tsis sib haum kho, yuam kev uas tshwm sim Thaum DNA replication raug lees paub, txiav tawm thiab hloov. Qhov no mismatched puag khub ua rau muaj qhov hloov pauv hloov pauv, uas koj tuaj yeem xav tias yog typo hauv DNA ntu ntawm cov hlua tshiab.
Pom zoo:
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