Cov txheej txheem pib thaum helicase unwinds ob lub helix thiab cais ob txoj hlua los tsim cov ntaub ntawv sib txawv ntawm rab rawg Replication diav rawg yog tus qauv uas tsim nyob rau hauv ntev helical DNA thaum DNA replication. Nws yog tsim los ntawm helicases, uas rhuav cov hydrogen bonds tuav ob DNA strands ua ke nyob rau hauv lub helix. Cov qauv tsim muaj ob ceg "prongs", txhua tus ua los ntawm ib txoj hlua ntawm DNA. https://en.wikipedia.org › wiki › DNA_replication
DNA replication - Wikipedia
. Topoisomerase pab cov txheej txheem no los ntawm kev txo qis kev sib hloov ntawm lub helix thaum nws tsis raug mob. DNA polymerase ntxiv nucleotides tshiab rau tus ntxhais strand, synthesizing DNA tshiab.
Dab tsi enzymes tshem DNA thaum rov ua dua?
Nyob rau hauv DNA replication, DNA helicases unwind DNA ntawm txoj haujlwm hu ua keeb kwm qhov chaw synthesis yuav pib. DNA helicase txuas ntxiv mus ua kom lub DNA tsim ib lub qauv hu ua replication diav rawg, uas yog lub npe rau lub forked tsos ntawm ob strands ntawm DNA raws li lawv unzipped sib nrug.
Lub enzyme twg yog lub luag haujlwm rau kev tshem tawm DNA thaum lub sijhawm DNA rov ua dua?
Nyob zoo. Cov enzyme tseem ceeb koom nrog hauv DNA replication, nws yog lub luag haujlwm rau 'unzipping' ob chav helix qauv los ntawm kev tawg cov hydrogen bonds ntawm lub hauv paus ntawmrov qab strands ntawm DNA molecule.
DNA tsis nyob hauv kev rov ua dua li cas?
txheej txheem. Hauv cov kab mob, cov protein DnaA yog tus replication pib. … Qhov kawg 13-mer sequence L, deb tshaj ntawm lub thawv DnaA no nws thiaj li tau txais unwound rau DnaB helicase encircling nws. Qhov no ua rau replication npuas rau DNA replication mus ua.
Thaum DNA tsis mob nws hu ua dab tsi?
DNA replication pib ntawm cov ntsiab lus tshwj xeeb, hu ua keeb kwm, qhov twg DNA ob lub helix tsis raug mob. Ib ntu luv ntawm RNA, hu ua primer, yog tom qab ntawd ua ke thiab ua qhov pib rau DNA synthesis tshiab.
