Video: Avery qhov kev sim tau pom dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nyob rau hauv ib qho yooj yim heev kev sim , Oswald Avery cov pab pawg qhia tias DNA yog "txoj cai hloov pauv." Thaum cais tawm ntawm ib hom kab mob, DNA tuaj yeem hloov pauv lwm hom kab mob thiab muab cov yam ntxwv rau qhov thib ob hom. DNA tau nqa cov ntaub ntawv keeb kwm yav dhau los.
Tom qab ntawd, ib tus tuaj yeem nug, Avery qhov kev sim ua pov thawj dab tsi?
Oswald Avery , Colin MacLeod, thiab Maclyn McCarty tau qhia tias DNA (tsis yog cov proteins) tuaj yeem hloov cov khoom ntawm cov hlwb, qhia meej txog cov tshuaj ntawm cov noob. Avery , MacLeod thiab McCarty tau txheeb xyuas DNA raws li "txoj cai hloov pauv" thaum kawm Streptococcus pneumoniae, cov kab mob uas tuaj yeem ua rau mob ntsws.
Griffith qhov kev sim qhia dab tsi? Griffith qhov kev sim yog ib kev sim ua nyob rau hauv 1928 los ntawm Frederick Griffith . Nws yog ib qho ntawm thawj kev sim qhia tias cov kab mob tuaj yeem tau txais DNA los ntawm cov txheej txheem hu ua kev hloov pauv. Cov kab mob no kis rau nas, Griffith cov nyiam tsiaj. Nws siv hom III-S (nqus) thiab hom II-R (ntxhib) hom.
Tsis tas li ntawd, Avery qhov kev sim ua li cas ntawm Griffith qhov kev tshawb pom?
Lawv tau sau cov DNA ntawm cov kab mob bacteriophage nrog cov xov tooj cua phosphorus & pom tias tom qab cov kab mob tau kis tus kab mob radioactive phosphorus nyob hauv cov kab mob. cell membrane tso cai rau cov molecules loj xws li DNA nkag mus.
Avery thiab nws cov npoj yaig nrhiav tau dab tsi?
Cov nrhiav pom tau hu ua "txoj cai hloov pauv" thiab dhau los nws kev sim, Avery thiab nws Cov neeg ua haujlwm sib koom ua ke pom tias qhov hloov pauv ntawm cov kab mob yog vim DNA. Yav dhau los, cov kws tshawb fawb xav tias qhov zoo li no tau nqa los ntawm cov protein, thiab DNA tau yooj yim dhau los ua cov khoom ntawm cov noob.
Pom zoo:
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Avery MacLeod thiab McCarty qhov kev sim qhia tau dab tsi?
Oswald Avery, Colin MacLeod, thiab Maclyn McCarty tau qhia tias DNA (tsis yog cov proteins) tuaj yeem hloov cov khoom ntawm cov hlwb, qhia meej txog cov tshuaj ntawm cov noob. Avery, MacLeod thiab McCarty tau txheeb xyuas DNA raws li "txoj cai hloov pauv" thaum kawm Streptococcus pneumoniae, cov kab mob uas tuaj yeem ua rau mob ntsws
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