Video: Avery MacLeod thiab McCarty qhov kev sim qhia tau dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Oswald Avery , Colin MacLeod , thiab Maclyn McCarty qhia tias DNA (tsis yog proteins) tuaj yeem hloov cov khoom ntawm cov hlwb, qhia meej txog cov tshuaj ntawm cov noob. Avery , MacLeod thiab McCarty txheeb xyuas DNA raws li "txoj cai hloov pauv" thaum kawm Streptococcus pneumoniae, cov kab mob uas tuaj yeem ua rau mob ntsws.
Ib yam li ntawd, tib neeg nug, Avery ua dab tsi hauv nws qhov kev sim?
Nyob rau hauv ib qho yooj yim heev kev sim , Oswald Avery cov pab pawg pom tias DNA yog txoj cai "transforming." Thaum cais tawm ntawm ib hom kab mob, DNA yog muaj peev xwm hloov tau lwm hom kab mob thiab confer yam ntxwv rau qhov thib ob hom. DNA yog nqa cov ntaub ntawv keeb kwm yav dhau los.
Tsis tas li ntawd, Avery McCarty thiab MacLeod txuas ntxiv txhim kho Griffith qhov kev sim ua li cas? Avery thiab nws cov npoj yaig tau pom tias DNA yog qhov tseem ceeb ntawm Griffith qhov kev sim , nyob rau hauv uas cov nas raug txhaj nrog cov kab mob tuag ntawm ib hom kab mob thiab cov kab mob nyob ntawm lwm tus, thiab txhim kho tus kab mob ntawm tus kab mob tuag hom.
Ib sab saum toj no, qhov xaus ntawm Avery qhov kev sim yog dab tsi?
Thaum cov kab mob tau kho nrog cov enzymes uas rhuav tshem DNA lawv pom tias kev hloov pauv tsis tshwm sim. Dab tsi yog Avery tuaj yeem xaus ntawm nws kev sim . Nws muaj peev xwm xaus tau tias DNA yog qhov hloov pauv. Hauv lwm lo lus, cov noob tau tsim los ntawm DNA.
Avery nrhiav tau dab tsi txog DNA?
Avery yog ib tus thawj kws tshawb fawb txog molecular biologists thiab ib tug pioneer hauv immunochemistry, tab sis nws paub zoo tshaj plaws rau qhov kev sim (tshaj tawm xyoo 1944 nrog nws cov neeg ua haujlwm. Colin MacLeod thiab Maclyn McCarty ) uas cais DNA raws li cov khoom ntawm cov noob caj noob ces thiab chromosomes raug tsim.
Pom zoo:
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