Dab tsi yog qhov ua haujlwm ntawm enzyme topoisomerase hauv DNA replication?

Video: Dab tsi yog qhov ua haujlwm ntawm enzyme topoisomerase hauv DNA replication?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Topoisomerases yog cov enzymes uas koom nyob rau hauv lub overwinding los yog underwinding ntawm DNA . Qhov teeb meem winding ntawm DNA tshwm sim vim qhov intertwined xwm ntawm nws ob-helical qauv. Thaum DNA replication thiab transcription, DNA ua overwound ua ntej ntawm ib rov ua dua diav rawg.

Tsis tas li ntawd, qhov ua haujlwm ntawm enzyme topoisomerase hauv DNA replication quizlet yog dab tsi?

cais cov strands los ntawm kev paub txog keeb kwm, rhuav tshem hydrogen bonds, thiab ua a rov ua dua npuas. Dab tsi yog qhov Lub hom phiaj ntawm topoisomerase ? unwinds lub resulting supercoils.

Ib tug kuj yuav nug, dab tsi enzymes koom nrog DNA replication? Enzymes koom nrog hauv DNA replication yog:

Helicase (Unwinds DNA ob helix)
Gyrase (relieves lub buildup ntawm torque thaum unwinding)
Primase (ntev RNA primers)
DNA polymerase III (lub ntsiab DNA synthesis enzyme)
DNA polymerase I (hloov RNA primers nrog DNA)
Ligase (ua rau hauv qhov khoob)

Hais txog qhov no, lub luag haujlwm ntawm topoisomerase hauv DNA replication yog dab tsi?

Topoisomerase Kuv yog ib tug ubiquitous enzyme uas nws muaj nuj nqi nyob rau hauv vivo yog los txo cov torsional strain nyob rau hauv DNA , tshwj xeeb kom tshem tawm cov supercoils zoo tsim nyob rau hauv pem hauv ntej ntawm lub rov ua dua diav rawg thiab txo qhov tsis zoo supercoils tshwm sim hauv qab ntawm RNA polymerase thaum transcription.

Helicases thiab topoisomerases yog dab tsi?

Zog thiab Metabolism Koj hais yog lawm, helicases thiab topoisomerases yog ob chav sib txawv ntawm cov enzymes. Helicases unwind ob-stranded DNA (ntawm ob peb lwm yam dej num uas peb tsis tau tham txog) thiab nyob rau hauv cov txheej txheem rhuav hydrogen bonds. Topoisomerases ua hauj lwm ntawm ob-stranded DNA kom relive lossis induce supercoils.

Pom zoo:

Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?

Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules

Lub luag haujlwm ntawm DNA polymerase hauv DNA replication Brainly yog dab tsi?

Kev piav qhia: DNA polymerase yog ib qho enzyme uas muaj ntau yam DNA polymerases. Cov no koom nrog hauv DNA replication, proofreading thiab kho DNA. Thaum lub sij hawm tus txheej txheem ntawm replication, DNA polymerase ntxiv nucleotides ntawm RNA primer

Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov ntab?

Integers thiab floats yog ob yam sib txawv ntawm cov ntaub ntawv tus lej. Ib tus lej (feem ntau hu ua anint) yog tus lej tsis muaj tus lej lej. Float isa floating-point number, uas txhais tau hais tias nws yog tus lej uas muaj tus lej lej. Floats siv thaum xav tau ntau dua

Dab tsi yog lub luag haujlwm ntawm DNA ligase hauv DNA replication?

DNA ligase yog ib qho enzyme uas kho irregularities los yog tawg nyob rau hauv lub caj qaum ntawm ob-stranded DNA molecules. Nws muaj peb lub luag haujlwm dav dav: Nws ntsaws ruaj ruaj hauv DNA, nws kaw cov khoom sib txuas ua ke, thiab nws txuas Okazaki fragments (cov DNA me me tau tsim thaum lub sij hawm rov ua dua ntawm ob-kab DNA)