RNAP tsis tsuas yog pib RNA transcription, nws tseem coj cov nucleotides mus rau hauv txoj hauj lwm, txhawb kev txuas thiab elongation, muaj cov ntaub ntawv pov thawj hauv nruab nrab thiab hloov peev xwm, thiab kev paub txog kev txiav tawm. Hauv eukaryotes, RNAP tuaj yeem tsim cov saw hlau ntev li 2.4 lab nucleotides.
Puas yog RNA polymerase muaj peev xwm ua pov thawj?
Txhua nucleic acid polymerases ntxig cov nucleotides tsis raug thaum lub sij hawm saw elongation. … Qhov kev hloov pauv siab no yog los ntawm tsis muaj peev xwm nyeem ntawv hauv RNA polymerases. Cov enzymes no ua yuam kev, tab sis lawv kho tsis tau.
Vim li cas RNA polymerase tsis muaj ntawv pov thawj?
Nws feem ntau xav tias RNA pol. Tsis tas yuav ua pov thawj, vim RNA molecules ua haujlwm cov ntawv luam uas tuaj yeem zam tau ob peb qhov yuam kev (thiab tuaj yeem hloov tau los ntawm cov ntawv luam tawm tshiab los ntawm DNA). Ceeb Toom: Muaj qee qhov pov thawj tias qee qhov RNA polymerases muaj 3' txog 5' exo kev ua thiab tuaj yeem ua pov thawj.
Puas proofreading tshwm sim nyob rau hauv transcription?
Proofreading pib nrog fraying ntawmcov misincorporated nucleotide deb ntawm DNA template, uas pauses transcription. Tom qab rov qab los ntawm RNAP los ntawm ib txoj hauj lwm ua rau cov nucleolytic cleavage ntawm RNA dinucleotide uas muaj cov misincorporated nucleotide.
Puas yog RNA polymerase muaj cov ntaub ntawv pov thawjkev ua si thaum lub sij hawm sau ntawv xeem ntawv?
RNA polymerase tsis muaj kev ua pov thawj thaum lub sijhawm sau ntawv.
