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 sib txuas thiab ua qhov pib rau DNA synthesis tshiab. Ib qho enzyme hu ua DNA polymerase tom ntej no pib rov ua dua DNA los ntawm kev sib piv cov hauv paus rau qhov qub strand.
DNA replication pib qhov twg?
Pib pib ntawm the oriC locus cov DNA molecule raug rho tawm thiab ob DNA polymerases, ib qho ntawm txhua strand pib luam ntawm txhua strand. Thaum lawv ua tiav DNA cais ntau dua. Tus ciam teb ntawm kev sib cais ntawm ib leeg-stranded thiab ob-stranded DNA yog hu ua replication diav rawg.
DNA replication pib qhov twg 3 lossis 5?
DNA yog ib txwm ua rau hauv 5'-rau-3' kev taw qhia, txhais tau hais tias nucleotides tsuas yog ntxiv rau 3' kawg ntawm txoj hlua loj hlob. Raws li pom hauv daim duab 2, pawg 5'-phosphate ntawm cov nucleotide tshiab khi rau 3'-OH pawg ntawm cov nucleotide kawg ntawm kev loj hlob strand.
DNA replication pib qhov twg?
DNA replication pib ntawm ib lub hauv paus chiv keeb ntawm kev rov ua dua, thiab ob lub replication diav rawg sib sau ua ke muaj mus (ntawm kwv yees li 500-1000 nucleotides ib ob) nyob rau hauv cov lus qhia rov qab mus txog thaum lawv sib ntsib kwv yees li ib nrab ntawm cov chromosome.
Puas DNA rov pib dua nruab nrab?
DNA replication pib ntawm ib lub hauv paus chiv keeb ntawm replication, thiab ob lub replication forks sib sau ua ke muaj mus (ntawm kwv yees li 500–1000 nucleotides ib ob) nyob rau hauv opposite lus qhia kom txog thaum lawv sib ntsib. kwv yees ib nrab ntawm cov chromosome (Daim duab 5-30).
