Video: Koj pom tRNA li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum txhais lus, tRNA molecules thawj zaug sib phim nrog cov amino acids uas haum lawv qhov chaw txuas. Ces, lub tRNAs nqa lawv cov amino acids mus rau mRNA strand. Lawv ua ke mus rau mRNA los ntawm txoj kev ntawm ib qho anticodon nyob rau sab nraud ntawm lub molecule. Txhua anticodon rau tRNA sib tw nrog ib codon ntawm mRNA.
Ntxiv mus, koj yuav nrhiav tau qhov tRNA li cas?
Thaum koj hla ib qho adenine (A) hauv DNA ib ntus , phim nws nrog uracil (U). Yog DNA ib ntus yog A-A-T-C-G-C-T-T-A-C-G-A, ces mRNA ib ntus yog U-U-A-G-C-G-A-A-U-G-C-U. Tsim ib tRNA anti-codon ib ntus los ntawm mRNA transcript. Txhua tRNA muaj ib txheej ntawm peb lub hauv paus ntawm nws lub npe hu ua anti-codon.
Ib tug kuj yuav nug, tRNA nyob qhov twg tom qab kev txhais lus? Thaum pib ntawm txhais lus , ribosome thiab a tRNA txuas rau mRNA. Cov tRNA yog nyob rau hauv ribosome thawj qhov chaw docking. Qhov no tRNA cov anticodon yog ntxiv rau mRNA qhov pib codon, qhov twg txhais lus pib. Cov tRNA nqa cov amino acid uas sib haum rau cov codon.
Kuj paub yog, tRNA tsim li cas?
Synthesis ntawm tRNA Hauv eukaryotic hlwb, tRNA yog tsim los ntawm cov protein tshwj xeeb uas nyeem DNA code thiab ua RNA luam, lossis ua ntej. tRNA . Cov txheej txheem no hu ua transcription thiab ua tRNA , nws yog ua los ntawm RNA polymerase III. Ua ntej- tRNA raug ua tiav thaum lawv tawm hauv lub nucleus.
Codons nyob qhov twg?
Yog tias koj xav tau 2 cov lus teb thib ob, codons yog pom hauv mRNA. Yog koj xav nrhiav codons rau mRNA ib ntus, koj saib yuav tsum tau ua raws cov protein.
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