Video: Dab tsi yog yuav tsum tau rau kev txhais lus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov khoom tseem ceeb xav tau kev txhais lus yog mRNA, ribosomes, tRNA thiab aminoacyl-tRNA synthetases. Thaum txhais lus mRNA nucleotide bases tau nyeem ua peb lub hauv paus codons, txhua tus lej rau ib qho amino acid.
Hais txog qhov no, tus txheej txheem ntawm kev txhais lus yog dab tsi?
Kev txhais lus yog cov txheej txheem ntawm kev txhais lus qhov sib lawv liag ntawm tus tub txib RNA (mRNA) molecule rau ib theem ntawm cov amino acids thaum lub sij hawm cov protein synthesis. Cov noob caj noob ces piav qhia txog kev sib raug zoo ntawm qhov sib lawv liag ntawm lub hauv paus khub hauv ib lub noob thiab cov amino acid sib txuas uas nws encodes.
Tsis tas li ntawd, dab tsi yog kev txhais lus hauv DNA? Kev txhais lus yog tus txheej txheem uas siv cov ntaub ntawv dhau los ntawm DNA raws li tus tub txib RNA thiab hloov nws mus rau hauv cov amino acids ua ke nrog peptide bonds. Lub ribosome yog qhov chaw ntawm qhov kev ua no, ib yam li RNA polymerase yog qhov chaw ntawm mRNA synthesis.
Tsis tas li ntawd, 4 kauj ruam ntawm kev txhais lus yog dab tsi?
Kev txhais lus tshwm sim hauv plaub theem: ua kom (ua kom npaj tau), pib (pib), elongation (ua kom ntev) thiab kev txiav txim (nres). Cov ntsiab lus no piav txog qhov kev loj hlob ntawm cov amino acid saw (polypeptide). Amino acids raug coj mus rau ribosomes thiab sib sau ua ke rau hauv cov protein.
3 kauj ruam hauv kev txhais lus yog dab tsi?
Kev txhais lus: Pib, nruab nrab, thiab xaus Kev txhais lus muaj ntau yam zoo tib yam peb ntu, tab sis lawv muaj cov npe zoo dua: pib , elongation , thiab kev txiav txim. Kev pib ("pib"): nyob rau theem no, lub ribosome tau ua ke nrog mRNA thiab thawj tRNA thiaj li pib txhais lus.
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