Video: Dab tsi yog deciphering ntawm genetic code?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov kev sim Nirenberg thiab Matthaei yog qhov kev sim tshawb fawb tau ua rau lub Tsib Hlis 15, 1961, los ntawm Marshall W. Qhov kev sim deciphered thawj ntawm 64 triplet codons nyob rau hauv noob caj noob ces los ntawm kev siv nucleic acid homopolymers los txhais cov amino acids tshwj xeeb.
Ib yam li ntawd, nws tau nug, koj txhais li cas los ntawm genetic code?
Cov noob caj noob ces yog cov txheej txheem uas cov ntaub ntawv encoded nyob rau hauv caj ces khoom siv ( DNA los yog RNA sequences) yog txhais ua cov proteins (amino acid sequences) los ntawm cov hlwb nyob. Cov noob uas code rau cov proteins yog tsim los ntawm tri-nucleotide units hu ua codons, txhua coding rau ib qho amino acid.
3 nres codons yog dab tsi? Nres codons yog cov kab ke ntawm DNA thiab RNA uas yuav tsum tau ua nres txhais los yog ua cov proteins los ntawm stringing amino acids ua ke. Muaj peb RNA nres codons : UAG, UAA, and UGA. Hauv DNA, uracil (U) yog hloov los ntawm thymine (T).
Ib yam li ntawd, tib neeg nug, leej twg nrhiav tau caj ces?
Discovery of the genetic code Xyoo 1961, Francis Crick thiab cov npoj yaig tau qhia txog lub tswv yim ntawm codon. Txawm li cas los xij, nws yog Marshall Nirenberg thiab cov neeg ua haujlwm sib koom tes uas tau txiav txim siab ntawm caj ces.
Muaj pes tsawg nres codons muaj?
3 STOP codons
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