Video: Vim li cas DNA replication tseem ceeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
DNA replication yog tseem ceeb vim tias tsis muaj nws, kev faib cell tsis tuaj yeem tshwm sim. Nrog DNA replication , cov set DNA ntawm ib lub xovtooj tuaj yeem muab duplicated thiab tom qab ntawd txhua lub xovtooj uas tshwm sim los ntawm kev faib tuaj yeem muaj nws tus kheej tag nrho DNA .. thiab cell division tuaj yeem theoretically txuas ntxiv mus tsis kawg.
Ntawm no, vim li cas DNA replication tseem ceeb rau txhua yam muaj sia?
Kev piav qhia: DNA replication yog ib qho tseem ceeb hauv tag nrho cov kab mob tiv thaiv cov meiosis thiab mitosis los ntawm kev tua cov hlwb. Yog DNA replication ua tiav, cov txheej txheem tuaj yeem nres ntawm qhov tshwm sim. Cov DNA doubles nws tus kheej kom muaj nuj nqis ntawm cov hlwb sib cais thaum lub sij hawm mitosis los yog meiosis.
Kuj Paub, dab tsi yog kev siv DNA replication? Hauv molecular biology, DNA replication yog cov txheej txheem lom neeg ntawm kev tsim ob qho tib si replicas ntawm DNA los ntawm ib tug original DNA molecule. DNA replication tshwm sim nyob rau hauv tag nrho cov muaj sia nyob ua lub hauv paus rau biological qub txeeg qub tes.
Ib sab saum toj no, vim li cas nws tseem ceeb uas DNA tuaj yeem hloov nws tus kheej?
Ib tseem ceeb cov cuab yeej ntawm DNA yog nws tuaj yeem rov ua dua , los yog luam tawm nws tus kheej . Txhua txoj hlua ntawm DNA hauv ob lub helix ua tau ua tus qauv rau duplicating qhov sib lawv liag ntawm hauv paus. Qhov no yog qhov tseem ceeb thaum cov cell sib faib vim tias txhua lub xov tooj tshiab yuav tsum muaj qhov tseeb luam ntawm DNA tam sim no nyob rau hauv lub qub cell.
DNA replication yooj yim li cas?
Rov ua dua yog tus txheej txheem uas ob-stranded DNA molecule yog theej los ua ob qho tib si DNA molecules. DNA replication yog ib qho ntawm feem ntau yooj yim cov txheej txheem uas tshwm sim hauv ib lub cell. Yuav kom ua tiav qhov no, txhua txoj hlua ntawm cov uas twb muaj lawm DNA ua raws li tus qauv rau rov ua dua.
Pom zoo:
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