Discontinous DNA synthesis tshwm sim ntawm 5' kawg mus rau 3' kawg ntawm niam txiv txoj hlua . Txoj hlua no feem ntau hu ua lagging strand. Nws yog ua tiav nyob rau hauv luv luv sequences ntawm nucleotides hu ua Okazaki fragments. Replication ntawm lub lagging strand pib nrog qhov sib ntxiv ntawm RNA primer RNA primer RNA primers nyob rau hauv vivo
Ib chav kawm ntawm enzymes hu ua primases ntxiv ib qho ntxiv RNA primer rau kev nyeem ntawv template de novo ntawm ob qho tib si ua thiab lagging strands. Pib los ntawm qhov pub dawb 3'- OH ntawm cov primer, hu ua primer terminus, DNA polymerase tuaj yeem txuas ntxiv cov hlua khi tshiab. https://en.wikipedia.org › wiki › Primer_(molecular_biology)
Primer (molecular biology) - Wikipedia
Yby the enzyme primase.
Vim li cas DNA synthesis tsis txuas ntxiv?
Ntawm lub qaum lagging strand, kev sib txuas tsis txuas ntxiv, txij li RNA primers tshiab yuav tsum tau ntxiv thaum qhib cov ntawv sib txuas txuas ntxiv kom nthuav tawm cov qauv tshiab. … Qhov tseeb, DNA synthesis tshwm sim raws li ib tug txheej txheem uas muaj ib tug dimeric polymerase molecule nyob rau hauv lub RF.
Ntawm qhov strand ntawm DNA replication yog discontinuous?
Lagging-strand replication yog tsis tu ncua, nrog luv Okazaki fragments raug tsim thiab tom qab txuas ua ke.
YPuas DNA synthesis tas mus li?
Daim duab 3: Kev rov ua dua ntawm DNA txoj hlua yognruam, thaum replication raws lub lagging strand yog discontinuous. Tom qab lub sijhawm luv luv ntawm DNA tau raug mob, kev sib txuas yuav tsum tau mus rau hauv 5 'mus rau 3' kev taw qhia; uas yog, nyob rau hauv cov kev taw qhia opposite uas yog unwinding.
Vim li cas DNA rov ua dua ob qho tib si txuas ntxiv thiab tsis txuas ntxiv?
Kev piav qhia: Hauv DNA ib txoj hlua yog nyob rau hauv 5' mus rau 3' kev taw qhia thiab lwm txoj hlua yog nyob rau hauv 3' mus rau 5' kev taw qhia. Lub DNA polymerase synthesize tus tshiab strand nyob rau hauv 5' rau 3' kev taw qhiayog li ib strand yog synthesized tsis tu ncua thiab lwm yam discontinuously.
