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?
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.
Vim li cas DNA replication yog Semiconservative?
DNA replication is semi-conservative vim nyob rau hauv cov txheej txheem replication qhov tshwm sim DNA helix yog tsim los ntawm ib tug tshiab strand thiab ib tug qub strand. Qhov no tshwm sim vim hais tias ntawm lub hauv paus kev sib koom ua ke, I.e. txhua lub hauv paus nitrogen tsuas yog ua khub nrog nws cov khub ntxiv.
Puas yog DNA rov ua dua Semiconservative thaum lub sij hawm mitosis?
Qhov no yog vim tias ib nrab ntawm cov DNA qub tau khaws cia hauv txhua qhov tshiab ntawm DNA. Yeej, cov molecule yog ib nrab-laus, semi-tshiab. Semi-conservative replication tshwm sim thaum tus txheej txheem hu ua interphase. … Qhov no yog kom lub cell npaj los faib los ntawm mitosis thaum kawg ntawm interphase.
Puas DNA rov ua dua yog Semiconservative thiab unidirectional?
Kev xaiv (B) tsis raug. Hom DNA replication nyob rau hauv E. coli yog semi-conservative thiab bidirectional tab sis tsis unidirectional. … coli tab sis nws yog replicated semi-conservatively li tawm ntawm obcov ntxhais DNA, ib txoj hlua los ntawm niam txiv DNA.
