2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
The Meselson thiab Stahl kev sim yog qhov kev sim ua pov thawj tias DNA rov ua dua yog ib nrab kev saib xyuas ib nrab kev saib xyuas Semiconservative replication piav qhia lub tshuab ntawm DNA rov ua dua hauv txhua lub hlwb paub. … Cov txheej txheem no hu ua semi-conservative replication vim hais tias ob daim ntawv luam ntawm tus thawj DNA molecule raug tsim. Txhua daim ntawv luam muaj ib qho qub strand thiab ib qho tshiab-synthesized strand. https://en.wikipedia.org › wiki › Semiconservative_replication
Semiconservative replication - Wikipedia
thiab nws tau pom thawj zaug hauv Escherichia coli thiab tom qab ntawd hauv cov kab mob siab dua, xws li cov nroj tsuag thiab tib neeg lub hlwb.
Qhov twg ntawm cov xwm txheej hauv qab no tau sim ua pov thawj los ntawm Hershey thiab Chase?
Hauv lawv qhov kev sim, Hershey thiab Chase tau pom tias thaum bacteriophages, uas yog tsim los ntawm DNA thiab protein, kis kab mob, lawv DNA nkag mus rau tus tswv tsev cov kab mob, tab sis feem ntau ntawm lawv. protein tsis. Hershey thiab Chase thiab cov kev tshawb pom tom ntej txhua tus tau ua pov thawj tias DNA yog cov khoom qub.
Qhov tshwm sim twg tau ua pov thawj los ntawm Meselson thiab Stahl Lawv siv dab tsi hauv lawv qhov kev sim?
Qhov kev sim Meselson-Stahl tau ua rau cov kws tshawb fawb los piav qhia yuav ua li cas DNA replicates, yog li muab lub hauv paus rau lub cev rau cov genetic phenomena ntawm heredity thiab kab mob.
Leej twgsim ua pov thawj tias DNA replication yog ib qho kev saib xyuas?
Qhov kev sim ua los ntawm Meselson thiab Stahl pom tau tias DNA rov ua dua ib nrab kev saib xyuas, txhais tau tias txhua txoj hlua hauv DNA molecule ua tus qauv rau kev sib txuas ntawm ib qho tshiab, ntxiv strand.. Txawm hais tias Meselson thiab Stahl tau ua lawv cov kev sim hauv cov kab mob E.
Leej twg hais tias DNA replication yog Semiconservative Nws tau sim ua pov thawj li cas los ntawm Meselson thiab Stahl?
Kev sim Meselson–Stahl yog kev sim los ntawm Matthew Meselson thiab Franklin Stahl hauv1958 uas txhawb Watson thiab Crick qhov kev xav tias DNA replication yog semiconservative.
Pom zoo:
Dab tsi ntawm cov hauv qab no tuaj yeem tshwm sim los ntawm evaporator khov?
Dab tsi ntawm cov hauv qab no tuaj yeem tshwm sim los ntawm evaporator khov? Huab cua tsis rub hla lub fins, Cov tub yees yuav tsis zoo evaporate. & Lub tshuab cua txias ua kom txias me ntsis lossis tsis muaj cua txias. Qhov twg ntawm cov xwm txheej hauv qab no tuaj yeem ua rau muaj qhov khov ntawm cov evaporator?
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Dab tsi ntawm cov hauv qab no nthuav tawm qhov tshwm sim ntawm cov hlau nplaum?
Dab tsi ntawm cov hauv qab no nthuav tawm qhov tshwm sim ntawm cov hlau nplaum? Kev piav qhia: Cov ntaub ntawv ferromagnetic nthuav tawm magnetisation txawm tias tsis muaj qhov chaw sab nraud. Cov cuab yeej no hu ua spontaneous magnetisation.
Dab tsi ntawm cov hauv qab no tshwm sim los ntawm tus aorta nqis?
Peb lub nkoj tawm ntawm lub aortic arch: cov hlab ntsha brachiocephalic, sab laug cov hlab ntsha carotid, thiab sab laug subclavian artery. Cov hlab ntsha no muab cov ntshav rau lub taub hau, caj dab, thorax thiab sab sauv. Hauv qab ntawm qhov qis qis ntawm lub thoracic aorta yog kab vertebral thiab cov hlab ntsha hemiazygos.
Dab tsi ntawm cov hauv qab no yog qhov tshwm sim ntawm kev sib ntaus sib tua ntawm lub pas dej brandywine?
Cov txiaj ntsig ntawm Kev Sib Tw ntawm Brandywine Creek yog dab tsi? Washington tsuas yog sim ncua kev ntes Philadelphia kom nws ua tiav li no. Cov tub rog Asmeskas tsis tau poob siab ntau thiab lawv tau khiav tawm ntawm British. Washington tseem tuaj yeem kawm los ntawm nws qhov yuam kev ntawm kev tso nws txoj cai sab xis qhib.
