Video: Puas muaj cov duab DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tab sis txog tam sim no, tsis muaj leej twg tau pom daim duab ntawm nws. Discovery Xov Xwm tshaj tawm Enzo di Fabrizio, tus kws tshawb fawb ntawm University of Genoa, Ltalis, tau tsim cov txheej txheem uas rub cov strands. DNA nruab nrab ntawm ob miniscule silicone ncej, ces duab lawv los ntawm electron microscope.
Ib yam li ntawd, tib neeg nug, DNA tiag tiag zoo li cas?
Nws suav nrog lub tshuab ntsuas hluav taws xob thiab lub txaj ntawm tes. DNA , peb tau qhia thaum ntxov, muaj yeeb yuj. Thaum peb saib ntawm cov duab tam sim no-icic ntawm ob lub helix, fuzzy X hauv fuzzy O, peb tsis pom qhov DNA Nws tus kheej ntau npaum li peb pom x-rays deflected los ntawm nws cov atoms.
Tom qab ntawd, lo lus nug yog, puas tau yees duab DNA? DNA ncaj qha Yees duab rau Thawj zaug. DNA cov ob-helix qauv yog nyob rau hauv cov zaub thawj zaug nyob rau hauv no electron microscope yees duab ntawm ib pob me me ntawm DNA strands. Tom qab ntawd lawv tau ci ntsa iab ntawm cov hluav taws xob los ntawm qhov hauv lub txaj silicon, thiab ntes cov duab siab ntawm cov teeb pom kev zoo.
Tom qab ntawd, koj puas tuaj yeem pom DNA?
Muab qhov ntawd DNA molecules muaj nyob rau hauv lub hlwb, lawv yog me me heev tsis pom ntawm qhov muag liab qab. Vim li no, yuav tsum muaj lub tshuab kuaj kab mob. Thaum nws tseem ua tau saib lub nucleus (muaj DNA ) siv lub teeb microscope, DNA strands / xov ua tau tsuas yog saib siv lub tshuab microscopes uas tso cai rau kev daws teeb meem siab dua.
DNA puas muaj xim?
Plaub code tshuaj nyob rau hauv tiag DNA feem ntau yog sawv cev los ntawm cov tsiaj ntawv T, A, C thiab G. Lawv tsis muaj xim, tab sis lawv muaj xws li: T thiab A ib txwm ua khub ua ke, xws li ua G thiab C. Qhov sib lawv liag raws ib lub caj qaum ntawm lub DNA molecule muaj tag nrho cov ntaub ntawv los rov tsim cov molecule.
Pom zoo:
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