2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Teb: Qhov pib ntawm DNA replication tshwm sim nyob rau hauv ob kauj ruam. Ua ntej, ib lub npe hu ua pib cov protein ua kom luv luv ntawm DNA ob helix. Tom qab ntawd, cov protein hu ua helicase txuas rau thiab rhuav tshem cov hydrogen bonds ntawm lub hauv paus ntawm DNA strands, yog li rub tawm ob txoj hlua.
DNA replication pib Brainly qhov twg?
DNA replication tshwm sim thaum S-theem ntawm interphase. DNA replication (DNA amplification) kuj tuaj yeem ua hauv vitro (xws li, sab nraud ntawm tes). DNA polymerases cais tawm ntawm cov hlwb thiab cov khoom tsim DNA primers tuaj yeem siv los pib DNA synthesis ntawm cov kab ke paub hauv cov qauv DNA molecule.
Thaum twg yuav tsum DNA rov tshwm sim?
DNA replication tshwm sim thaum lub sijhawm S (theem Synthesis) ntawm lub voj voog ntawm tes, ua ntej mitosis thiab cell division. Cov cai ntawm kev sib koom ua ke yog qhov tseem ceeb rau cov txheej txheem ntawm kev rov ua dua tshiab. DNA replication tshwm sim thaum DNA tau theej los ua ib qho zoo tib yam molecule ntawm DNA.
DNA replication pib qhov twg?
Kev rov ua dua tshiab tshwm sim hauv peb kauj ruam tseem ceeb: qhib ob lub helix thiab kev sib cais ntawm DNA strands, priming ntawm template strand, thiab sib dhos ntawm cov DNA tshiab. Thaum sib cais, ob txoj hlua ntawm DNA ob lub helix uncoil ntawm ib qho chaw tshwj xeeb hu ua lub hauv paus.
Thaum DNA rov pib ua li cas?
DNAreplication pib ntawm cov ntsiab lus tshwj xeeb, hu ua keeb kwm, qhov twg DNA ob chav helix tsis raug mob. Ib ntu luv ntawm RNA, hu ua primer, yog tom qab ua kethiab ua raws li qhov pib ntawm 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 tus thawj strand.
Pom zoo:
Lub sijhawm twg nrog dna replication tshwm sim?
Thaum Mitosis, DNA tau rov ua dua thaum the S theem (Synthesis theem) ntawm Interphase. Interphase yog qhov pib lub neej txhua hnub ntawm lub xov tooj ntawm tes. Cells siv feem ntau ntawm lawv lub neej hauv Interphase ua ntej Mitosis tshwm sim (M theem).
Puas yog dna replication semiconservative?
Thaum kawg, xyoo 1958 Meselson thiab Stahl tau pom tias qhov rov ua dua ntawm DNA yog qhov tseeb semiconservativenrog txhua tus ntxhais chromosome suav nrog cov laus, niam txiv txoj hlua thiab ib qho tshiab, ntxiv strand (5). Puas yog DNA replication Semiconservative lossis kev saib xyuas?
Nyob rau hauv proofreading thaum dna replication?
Thaum lub sijhawm DNA rov ua dua (luam tawm), feem ntau DNA polymerases tuaj yeem "kuaj lawv cov haujlwm" nrog txhua lub hauv paus uas lawv ntxiv. Cov txheej txheem no hu ua proofreading. … Polymerase ntaus tias cov hauv paus yog mispaired.
Puas mesosome pab hauv dna replication?
Ntawm thaj tsam ntawm plasma membrane. Cov lus qhia: Mesosome yog cov kab mob organelle uas ua raws li kev cuam tshuam ntawm cov ntshav plasma thiab ua haujlwm hauv txawm tias rov ua dua ntawm DNA thiab cell faib lossis tshem tawm ntawm exoenzymes.
Puas yog dna replication conservative lossis semiconservative?
DNA replication yog ib txheej txheem kev saib xyuas ib nrab, vim tias thaum tsim cov DNA molecule ob zaug tshiab: Ib txoj hlua yuav yog los ntawm cov qauv qauv qub. Puas yog DNA replication conservative Semiconservative los yog dispersive?
