Dab tsi ua kom muaj tseeb DNA rov ua tau?
Dab tsi ua kom muaj tseeb DNA rov ua tau?

Video: Dab tsi ua kom muaj tseeb DNA rov ua tau?

Video: Dab tsi ua kom muaj tseeb DNA rov ua tau?
Video: Tuag Ua Dab Tsi💘by TXOS LAUJ / Nkauj Tawm Tshiab 2021 Official 2024, Kaum ib hlis
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Dab tsi ua kom muaj tseeb DNA rov ua tau ? Lub geometry ntawm ib tus neeg lub hauv paus khub tso cai tsuas yog ib lub hauv paus los tsim ib daim ntawv cog lus hydrogen nrog nws lub hauv paus ntxiv.

Ib yam li ntawd, dab tsi ua rau DNA replication ua tau?

DNA Replication Yuav ua li cas DNA Ua Cov ntawv luam ntawm nws tus kheej. Ua ntej lub cell faib, nws DNA yog luam tawm (duplicated.) Vim tias ob txoj hlua ntawm a DNA molecule muaj complementary puag khub, lub nucleotide ib ntus ntawm txhua strand cia li muab cov ntaub ntawv xav tau los tsim nws tus khub.

Tsis tas li ntawd, vim li cas DNA replication tsuas tshwm sim nyob rau 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.

Hais txog qhov no, vim li cas DNA replication yuav tsum muaj tseeb?

Ua ntej lub cell yuav faib, nws yuav tsum yog replicate nws DNA kom txhua tus ntxhais ntawm tes tau txais ua tiav thiab yog lawm cov ntaub ntawv caj ces. DNA replication suav nrog cov txheej txheem proofreading uas pab kom ntseeg tau qhov tseeb.

Vim li cas nws tseem ceeb uas cov ntawv luam ntawm DNA raug tsim thaum lub sij hawm luam?

Tsim cov ntawv luam ntawm DNA xyuas kom meej tias thaum lub cell sib faib, cov xeeb leej xeeb ntxwv yuav tau txais tib yam genetic ntaub ntawv raws li niam txiv cell. Tej zaum lawv yuav muaj kev sib raug zoo nrog ib leeg hauv lub DNA strands.

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