Video: Thaum twg Rosalind Franklin pab txhawb rau kev tshawb pom DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Franklin paub zoo tshaj plaws rau nws txoj haujlwm ntawm X-ray diffraction dluab ntawm DNA , tshwj xeeb yog Daim Duab 51, thaum nyob hauv King's College London, uas coj mus rau nrhiav pom ntawm DNA ob lub helix uas James Watson, Francis Crick thiab Maurice Wilkins tau qhia txog Nobel nqi zog hauv Physiology lossis Tshuaj hauv xyoo 1962.
Raws li txoj cai, Rosalind Franklin tau pab txhawb rau DNA xyoo twg?
Rosalind Elsie Franklin (25 Lub Xya Hli 1920 - 16 Plaub Hlis 1958)[1] yog ib tug British biophysicist thiab X-ray crystallographer uas ua qhov tseem ceeb kev pab kom nkag siab txog cov qauv zoo molecular ntawm DNA , RNA, kab mob, thee thiab graphite.
Ib yam li ntawd, Rosalind Franklin tau ua lub luag haujlwm dab tsi hauv kev tshawb pom cov qauv ntawm DNA? Ntawm King's College London, Rosalind Franklin tau cov duab ntawm DNA siv X-ray crystallography, ib lub tswv yim ua ntej broached los ntawm Maurice Wilkins. Franklin tus dluab tso cai rau James Watson thiab Francis Crick los tsim lawv lub npe nrov ob-strand, lossis ob-helix, qauv.
Hais txog qhov no, leej twg yog Rosalind Franklin thiab nws nrhiav tau dab tsi?
British kws tshuaj Rosalind Franklin Nws yog qhov paub zoo tshaj plaws rau nws lub luag haujlwm hauv kev tshawb pom cov qauv ntawm DNA, thiab rau nws txoj kev siv X-ray diffraction.
Leej twg nrhiav tau DNA tiag tiag?
Ntau tus neeg ntseeg tias American biologist James Watson thiab English physicist Francis Crick nrhiav DNA hauv xyoo 1950. Qhov tseeb, qhov no tsis yog li ntawd. Hloov chaw, DNA tau pom thawj zaug hauv 1860s lig los ntawm Swiss chemist Friedrich Miescher.
Pom zoo:
Dab tsi yog 5 txoj haujlwm loj ntawm kev kawm uas pab txhawb rau kev tshawb fawb ib puag ncig?
Tsib txoj haujlwm tseem ceeb ntawm kev kawm yog biology, kawm txog cov kab mob nyob; Lub ntiaj teb kev tshawb fawb, kev tshawb fawb ntawm lub ntiaj teb tsis muaj sia nyob thiab lub ntiaj teb; physics, kev kawm txog cov teeb meem thiab lub zog; chemistry, kev kawm txog tshuaj thiab lawv cov kev sib cuam tshuam, thiab kev tshawb fawb txog kev sib raug zoo, kev kawm txog tib neeg cov pejxeem
Erwin Chargaff pab txhawb dab tsi rau kev tshawb pom DNA?
Los ntawm kev sim ua tib zoo, Chargaff tau tshawb pom ob txoj cai uas tau pab coj mus rau kev tshawb pom ntawm ob chav helix qauv ntawm DNA. Thawj txoj cai yog hais tias nyob rau hauv DNA tus naj npawb ntawm guanine units yog sib npaug zos rau cov cytosine units, thiab tus naj npawb ntawm adenine units yog sib npaug zos rau cov thymine units
Thaum twg Matthias Jakob Schleiden pab txhawb rau txoj kev xav ntawm tes?
Matthias Jacob Schleiden yog ib tug German botanist uas, nrog Theodor Schwann, cofounded cell theory. Xyoo 1838 Schleiden txhais lub xovtooj ntawm tes raws li lub hauv paus ntawm cov qauv cog, thiab ib xyoos tom qab Schwann txhais lub xovtooj ntawm tes yog qhov tseem ceeb ntawm cov qauv tsiaj
Thaum twg Henri Becquerel pab txhawb rau atomic txoj kev xav?
Kev loj hlob ntawm Atomic Theory. Xyoo 1896, Henri Bequerel tau kawm txog cov khoom siv fluorescent ntawm uranium ntsev thiab muab ib daim ntawm uranium ntsev rau saum lub phaj thaij duab qhwv hauv daim ntawv dub. Nws pom, raws li kev loj hlob, tias lub phaj tau nthuav tawm hauv cov duab ntawm cov qauv uranium
Francis Crick pab txhawb rau kev tshawb pom DNA li cas?
Francis Crick, James Watson thiab Maurice Wilkins tau qhia txog 1962 Nobel Prize for Physiology lossis Tshuaj rau kev daws cov qauv ntawm DNA. Txoj kev xav ntawm RNA coding tau sib cav thiab sib tham, thiab xyoo 1961, Francis Crick thiab Sydney Brenner tau muab cov pov thawj caj ces uas tus lej triplet tau siv los nyeem cov khoom siv caj ces