Video: Vim li cas DNA tseem ceeb rau kev tsim cov protein?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lo lus teb yog koj li DNA yog qhov tshwj xeeb. DNA yog thawj cov khoom siv noob caj noob ces muaj nyob rau hauv koj lub hlwb thiab ze li ntawm tag nrho cov kab mob. Nws yog siv los tsim cov proteins thaum protein synthesis , uas yog txheej txheem ntau kauj ruam uas yuav siv cov lus coded ntawm DNA thiab converts nws mus rau hauv usable protein ntau molecule.
Ua li no, vim li cas DNA thiaj tseem ceeb?
DNA yog tseem ceeb rau tag nrho cov muaj sia nyob - txawm nroj tsuag. Nws yog tseem ceeb rau qhov qub txeeg qub teg, coding rau cov proteins thiab cov kev qhia genetic qhia rau lub neej thiab nws cov txheej txheem. DNA tuav cov lus qhia rau lub cev los yog txhua lub cell txoj kev loj hlob thiab kev tsim tawm thiab thaum kawg tuag.
Tsis tas li ntawd, dab tsi yog lub luag haujlwm ntawm cov noob hauv cov protein synthesis? Feem ntau noob muaj cov ntaub ntawv xav tau los ua cov molecules ua haujlwm hu ua cov proteins . (Ib ob peb noob tsim lwm cov molecules uas pab lub cell sib sau ua ke cov proteins .) Kev taug kev los ntawm noob rau protein ntau yog complex thiab nruj tswj nyob rau hauv txhua lub cell. (Amino acids yog lub tsev blocks ntawm cov proteins .)
Tsis tas li lo lus nug yog, dab tsi yog qhov yuav tsum tau ua rau cov protein synthesis?
Lwm qhov kev xav tau loj rau protein synthesis yog tus txhais lus molecules uas lub cev "nyeem" cov mRNA codons. Hloov RNA (tRNA) yog ib hom RNA uas ferries qhov tsim nyog cov amino acids coj mus rau ribosome, thiab txuas txhua cov amino acid tshiab mus rau qhov kawg, tsim cov polypeptide saw ib-los-ib.
DNA siv niaj hnub no li cas?
Hnub no , DNA kev kuaj tus kheej yog dav siv nyob rau hauv daim teb ntawm forensics thiab paternity identification. Thaum kawg, DNA kev kuaj tus kheej tuaj yeem ua tau siv txhawm rau ntsuam xyuas cov qog nqaij hlav tom qab hloov pauv thiab yog li txiav txim siab seb qhov mob qog nqaij hlav puas yog tus neeg pub dawb lossis tus neeg tau txais keeb kwm.
Pom zoo:
Vim li cas thiaj tseem ceeb rau cov kws tshawb fawb nrhiav txoj hauv kev los npaj cov ntsiab lus?
Inventor: Dmitri Mendeleev
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