2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Hauv kev txhais lus, cov codons ntawm mRNA tau nyeem nyob rau hauv kev txiav txim (los ntawm 5' kawg mus rau 3' kawg) los ntawm molecules hu ua hloov RNAs, lossis tRNAs. Txhua tRNA muaj cov tshuaj tiv thaiv kab mob, ib txheej ntawm peb nucleotides uas khi rau qhov sib txuam mRNA codon los ntawm kev sib koom ua ke.
mRNA codons nyeem los ntawm dab tsi?
Thaum kev txhais lus, ib ntu mRNA tau nyeem siv tus kab mob caj ces, uas yog cov txheej txheem uas txhais tau li cas mRNA ib ntus yuav tsum tau muab txhais ua 20 tsab ntawv code ntawm cov amino acids, uas yog lub tsev blocks ntawm cov proteins.
mRNA nyeem hauv kev txhais li cas?
Txhua mRNAs tau nyeem hauv the 5' mus rau 3' kev taw qhia, thiab cov saw hlau polypeptide tau tsim los ntawm cov amino mus rau carboxy terminus. Txhua cov amino acid tau teev los ntawm peb lub hauv paus (ib codon) hauv mRNA, raws li txoj cai ze li ntawm universal genetic code.
mRNA codon ua dab tsi hauv kev txhais lus?
mRNA codons tau nyeem los ntawm 5' mus rau 3', thiab lawv qhia qhov kev txiav txim ntawm amino acids hauvprotein ntawm N-terminus (methionine) mus rau C-terminus. Kev txhais lus suav nrog kev nyeem cov mRNA nucleotides hauv pawg ntawm peb; txhua pab pawg qhia txog cov amino acid (los yog muab lub teeb liab nres qhia tias kev txhais lus tiav lawm).
mRNA codon yog dab tsi thiab lawv nyeem dab tsi?
Genetic code
Thaum kev sau ntawv, RNA polymerase nyeem cov qauv DNAstrand nyob rau hauv lub 3′→ 5′ kev taw qhia, tab sis lub mRNA yog tsim nyob rau hauv lub 5′ rau 3′ kev taw qhia. … Cov codons ntawm mRNA nyeem ntawv yog txhais nyob rau hauv lub 5′→3′ kev taw qhia rau hauv cov amino acids los ntawm ib tug ribosome los tsim ib tug polypeptide saw.
Pom zoo:
Lub sijhawm txhais lus n-formyl-methionine-trna khi rau mrna nrog kev pab ntawm?
Thaum N-formylmethionine (fMet)-tRNA khi nrog P site, tRNA molecule nrog an anticodon uas koom nrog codon ntawm cov neeg nyob sib ze pib codon tuaj yeem ua ke nrog cov Ib qhov chaw ntawm 70S pib ua haujlwm. TRNA khi rau mRNA li cas? TRNA khi rau codons hauv mRNA li cas?
Lub sijhawm kuv lub sijhawm dawb lossis thaum kuv lub sijhawm dawb?
yog li, qhov no txhais tau tias "thaum kuv lub sijhawm dawb" tsis siv ntauthiab koj muab "hauv kuv lub sijhawm dawb" ntau dua nyob rau qhov kawg ntawm kab lus. Piv txwv li: Kuv tau taug kev tus dev thaum kuv lub sijhawm dawb.
Dab tsi yog qhov txawv ntawm kev nyeem ntawv thiab tsis nyeem ntawv?
Taw qhia. Muaj peev xwm nyeem thiab sau tau yog hu ua kev nyeem ntawv; nws opposite is illiteracy. … Hauv qee lub zej zog ib tug neeg uas nyeem tau cov ntawv ntawm cov tsiaj ntawv los yog nyeem thiab sau nws tus kheej lub npe yog suav hais tias nyeem ntawv.
Ntawm yog lub ntsiab lus ntawm lub ntsiab lus ntawm lo lus devout?
nature. Dab tsi yog qhov denotative lub ntsiab lus ntawm lo lus devout? denotative lub ntsiab lus: Ib yam dab tsi kos npe los yog xa mus rau; ib lub ntsiab lus ntawm lub cim. teb: pious. Vim li cas Chaucer sau Lub Canterbury Tales hauv lus?
Lub sijhawm nyob qhov twg ntawm lub sijhawm teem sijhawm?
kab kab rov tav ntawm lub rooj ntu ntu yog hu ua ntu ntu. Lub sijhawm nyob rau ntawm lub sijhawm nyob qhov twg? Ib lub sijhawm yog kab kab rov tav ntawm lub rooj ntu ntu. Muaj xya lub sij hawm nyob rau hauv lub sij hawm ntawm lub sij hawm, nrog txhua tus pib ntawm sab laug.
