Video: Dab tsi yog cov txheej txheem uas tsim cov ntawv luam tshiab ntawm cov kab mob caj ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov txheej txheem ntawm DNA replication tsim ib daim ntawv theej tshiab ntawm lub cev cov ntaub ntawv caj ces hla mus rau a tshiab cell. Dawb ntab nucleotides yog txuam nrog lawv cov lus qhuas los ntawm ib qho enzyme hu ua polymerase. Cov no yog "lub tsev." Lawv sib sau ua ke a tshiab DNA strand raws txhua qhov qub strands.
Tib neeg kuj nug, dab tsi yog cov ntaub ntawv caj ces ntawm lub cev?
Qhov sib lawv liag ntawm DNA nqa cov ntaub ntawv caj ces ntawm ib lub cev . Cov txheej txheem ntawm DNA replication tsim ib daim qauv tshiab ntawm ib qho kab mob cov ntaub ntawv genetic . Cov duab ob-coiled ntawm DNA yog hu ua ob chav helix. Proteins yog tsim los ntawm cov amino acids.
Tsis tas li ntawd, thawj kauj ruam hauv cov txheej txheem ntawm DNA replication yog dab tsi? Cov thawj kauj ruam hauv DNA replication yog kev sib cais ntawm ob DNA strands uas ua rau lub helix uas yuav tsum tau theej. DNA Helicase untwists lub helix ntawm qhov chaw hu ua rov ua dua keeb kwm. Cov rov ua dua keeb kwm tsim ib daim duab Y, thiab hu ua a rov ua dua diav rawg.
Ntawm no, cov txheej txheem twg luam cov kab mob DNA?
Replication yog qhov txheej txheem los ntawm qhov uas ob-stranded DNA molecule yog luam los tsim ob qho tib si DNA molecules. DNA replication yog ib qho tseem ceeb tshaj plaws txheej txheem uas tshwm sim hauv ib lub cell.
Dab tsi ua rau nucleotide?
A nucleotide muaj peb yam: Lub hauv paus nitrogenous, uas tuaj yeem yog adenine, guanine, cytosine, lossis thymine (nyob rau hauv rooj plaub ntawm RNA, thymine yog hloov los ntawm uracil). Ib qho tsib-carbon qab zib, hu ua deoxyribose vim nws tsis muaj cov pa oxygen ntawm ib qho ntawm nws cov carbons. Ib lossis ntau pawg phosphate.
Pom zoo:
Dab tsi yog txheej txheem hu ua uas tsim cov dej hiav txwv tshiab hauv pem teb los ntawm diverging daim hlau?
Seafloor kis tau tus txheej txheem uas tshwm sim nyob rau hauv nruab nrab ntug dej hiav txwv ridges, qhov twg tshiab dej hiav txwv crust yog tsim los ntawm volcanic kev ua si thiab maj mam txav deb ntawm lub ridge
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus
Cov txheej txheem dab tsi uas tus kws tshawb fawb siv los tsim ntau cov ntawv luam ntawm DNA xav tau sau rau hauv daim ntawv dawb paug 1?
Molecular Cloning. Cloning tso cai rau tsim ntau cov ntawv luam ntawm cov noob, qhia cov noob, thiab kawm txog cov noob tshwj xeeb. Yuav kom tau txais cov DNA tawg rau hauv cov kab mob hauv cov kab mob hauv daim ntawv uas yuav tau theej lossis nthuav tawm, cov khoom tawg yog thawj zaug tso rau hauv plasmid
Dab tsi yog cov kab ke uas nqa cov ntaub ntawv caj ces ntawm lub cev?
Qhov sib lawv liag ntawm DNA nqa cov ntaub ntawv caj ces ntawm lub cev. Cov txheej txheem ntawm DNA replication tsim ib daim qauv tshiab ntawm cov kab mob cov ntaub ntawv caj ces. Cov duab ob-coiled ntawm DNA yog hu ua ob chav helix. Proteins yog tsim los ntawm cov amino acids
Ib puag ncig ntawm ib lub xov tooj ntawm tes thiab cov kab mob cuam tshuam li cas ntawm cov noob caj noob ces?
Splicing ntawm mRNA nce tus naj npawb ntawm cov protein sib txawv uas lub cev muaj peev xwm tsim tau. Gene qhia yog tswj los ntawm cov proteins uas khi rau cov hauv paus hauv paus hauv DNA. Ib puag ncig ntawm ib lub xovtooj ntawm tes thiab ntawm lub cev muaj feem cuam tshuam rau cov noob caj noob ces