Video: Yog vim li cas cov thawj thiab lagging strand replicated txawv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Vim qhov kev taw qhia antiparallel ntawm ob chromosomal DNA strands , ib txoj hlua ( coj txoj hlua ) yog luam tawm nyob rau hauv ib tug feem ntau processive yam, thaum lwm yam ( lagging strand ) yog synthesized nyob rau hauv luv luv seem hu ua Okazaki fragments.
Yog li ntawd, yog vim li cas cov thawj thiab lagging strands synthesized txawv?
DNA strands yog antiparallel. DNA polymerase tuaj yeem ua haujlwm tsis tu ncua mus rau qhov sib txuas ntawm rab rawg nkaus xwb ntawm ib qho txoj hlua (cov coj txoj hlua ) thaum nyob rau lwm qhov txoj hlua (cov lagging strand ) nws yuav tsum tau mus deb ntawm lub replication diav rawg. Cov lagging strand ua li ntawd tsis tu ncua hauv ntu hu ua Okazaki fragments.
Ib yam li ntawd, qhov zoo sib xws ntawm lub lagging strand thiab cov coj strand yog dab tsi? 1. A coj txoj hlua yog cov txoj hlua uas yog synthesized hauv lub 5'-3'direction thaum a lagging strand yog cov txoj hlua uas yog synthesized hauv lub 3'-5' direction. 2. Cov coj txoj hlua yog synthesized tsis tu ncua thaum a lagging strand yog synthesized hauv fragments uas hu ua Okazaki fragments.
Tsis tas li ntawd, dab tsi yog qhov txawv ntawm qhov ua thiab lagging strand hauv DNA replication?
Okazaki Fragments. Ntawm a rov ua dua qob, ob strands yog synthesized hauv a 5' → 3' kev taw qhia. Cov coj txoj hlua yog synthesized tsis tu ncua, whereas lub lagging strand yog synthesized nyob rau hauv luv luv pieces hu ua Okazaki fragments.
Yog vim li cas lub lagging strand qeeb qeeb tshaj li tus thawj strand?
Yog li, replication ntawm lub lagging strand tshwm sim nyob rau hauv qhov kev tawm tsam rau uas ntawm coj txoj hlua thiab replication diav rawg. Yog li ntawd, replication ntawm lub lagging strand yog a qeeb dua thiab txheej txheem nyuaj dua tshaj uas ntawm coj txoj hlua . Yog li nws pom ua lag qab lub coj txoj hlua (li no lub npe).
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