2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
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 hauv paus ntxiv ntawm codon thiab anticodon tau tuav ua ke los ntawm hydrogen bonds, tib hom kev sib cog lus uas tuav ua ke cov nucleotides hauv DNA. Lub ribosome tsuas yog tso cai rau tRNA los khi rau mRNA yog tias nws nqa cov amino acid.
Vim li cas formyl thiaj ntxiv rau methionine?
Nyob rau hauv cov kab mob, cov protein synthesis pib nrog N-formylmethionine. Cov pawg formyl no ntawm qhov pib methionine residue yuav tsum raug tshem tawm los ntawm deformylase thiaj li methionine aminopeptidase tuaj yeem tshem tawm qhov pib methionine residue.
Txoj haujlwm twg fMet tRNA fMet ntawm qhov pib codon hauv kev txhais lus prokaryotic?
GUG thiab UUG pib codons raug lees paub los ntawm fMet-tRNAifMet anticodon (5′-CAU-3′) los ntawm "wobble" puag- pairing ntawm 1st txoj hauj lwm ntawm pib codon (NUG). Cov lus piav qhia yuav ua rau vim li cas Cov Kabmob tso cai pib los ntawm cov codons no yuav txhawj xeeb txog qhov tshwj xeeb hauv lub voj anticodon ntawm fMet-tRNAifMet.
mRNA khi rau dab tsihauv translation?
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 cov molecules hu ua transfer RNAs, los yog 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.
Pom zoo:
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Lub sijhawm txhais lus lub codon ntawm mrna yog 'nyeem' los ntawm?
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.
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.
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.
