DNA replication thiab sib cais nyob qhov twg?
DNA replication thiab sib cais nyob qhov twg?

Video: DNA replication thiab sib cais nyob qhov twg?

Video: DNA replication thiab sib cais nyob qhov twg?
Video: Andrzej Stasiak: Revealing the secrets of chromosome organization by numerical simulations 2024, Kaum ib hlis
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Ua li cas DNA replicated ? Replication tshwm sim nyob rau hauv peb cov kauj ruam loj: qhib ob lub helix thiab kev sib cais ntawm DNA strands, priming ntawm template strand, thiab lub rooj sib txoos ntawm cov tshiab DNA ntu. Thaum kev sib cais , ob lub qhov muag DNA ob chav helix uncoil ntawm ib qho chaw tshwj xeeb hu ua keeb kwm.

Yog li ntawd, qhov chaw twg DNA cais thiab rov ua dua tshiab yog dab tsi?

rov ua dua diav rawg. Cov qhov chaw uas DNA replication thiab kev sib cais tshwm sim hu ua. hydrogen bonds ntawm lub hauv paus khub yog tawg thiab ob strands ntawm lub molecule unwind.

Tsis tas li ntawd, dab tsi tshwm sim thaum lub molecule ntawm DNA yog unzipped? Thaum twg DNA yog unzipped , hydrogen bonds ntawm lub hauv paus khub yog tawg thiab ob strands ntawm lub molecule tso siab. Muaj tseeb tiag. Txhua DNA molecule uas tshwm sim los ntawm replication muaj ib tug thawj strand thiab ib tug tshiab strand.

Kuj paub yog, qhov twg DNA replication tshwm sim?

DNA replication tshwm sim nyob rau hauv lub cytoplasm ntawm prokaryotes thiab nyob rau hauv lub nucleus ntawm eukaryotes. Txawm nyob qhov twg DNA replication tshwm sim , cov txheej txheem hauv paus yog tib yam.

Vim li cas DNA replication tsuas yog tshwm sim hauv 5 mus rau 3 kev taw qhia?

Teb thiab piav qhia: DNA replication tsuas yog tshwm sim hauv 5' rau 3 ' kev taw qhia vim DNA polymerase yuav tsum tau dawb 3 ' hydroxyl pab pawg kom txuas cov nucleotide tshiab rau.

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