2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Thaum cov protein ntau tsis tau ua tiav, ob lub subunits ntawm ribosome raug cais. Xyoo 2000, qhov ua tiav peb-dimensional qauv ntawm cov loj thiab me subunits ntawm ib tug ribosome tau tsim.
Yuav ua li cas rau cov ribosomal subunits?
Thaum ua ke cov protein tshiab, ob lub subunits kaw ua ke nrog tus xa xov RNA dai rau hauv qhov chaw nruab nrab ntawm. Lub ribosome mam li taug kev los ntawm tus xa xov RNA peb nucleotides ntawm ib lub sij hawm, tsim cov protein tshiab ib zaug. Loj subunit ntawm lub ribosome, nrog cov catalytic RNA nucleotide nyob rau hauv ntsuab.
Yuav ua li cas rau ntawm cov ribosomal subunits me thiab loj?
Lub subunit me me ("40S" hauv eukaryotes) txiav txim siab cov lus caj ces thiab cov subunit loj ("60S" hauv eukaryotes) catalyzes peptide daim ntawv cog lus.
Yuav ua li cas ribosomal subunits tuav ua ke?
Ob lub subunits (30S thiab 50S) ntawm cov kab mob 70S ribosome yog tuav ua ke los ntawm 12 dynamic txuas nrog RNA–RNA, RNA–protein, thiab protein-protein kev sib cuam tshuam. Cov txheej txheem ntawm kev tsim choj, xws li seb tag nrho cov txuas hniav no tau tsim ib txhij los yog nyob rau hauv ib qho kev txiav txim, tsis to taub.
Yuav ua li cas rau ribosomal subunits tom qab txhais?
Thaum lub sijhawm txhais lus, ob lub subunits tuaj ua ke nyob ib ncig ntawm mRNA molecule, ua tiav ribosome. Lub ribosome txav mus rau pem hauv ntej ntawm mRNA, codon los ntawm codon, raws li nwsyog nyeem thiab txhais ua polypeptide (protein chain). Tom qab ntawd, thaum txhais tiav lawm, ob daim tuaj sib nrug dua thiab tuaj yeem rov siv dua.
Pom zoo:
Puas yog kev cais cais ua rau muaj kev tsov rog?
Sectionalism yog qhov laj thawj tseem ceeb ntawm Tebchaws Meskas Kev Tsov Rogvim tias nws yog ib qho tseem ceeb rau kev tsim lub neej yav qab teb nrog rau kev hloov pauv nws txoj kev coj noj coj ua, tsis yog qhov teeb meem ntawm kev ua cev qhev, uas tsuas cuam tshuam ib feem me me ntawm cov neeg sab qab teb.
Thaum twg koj yuav siv cov ntaub ntawv txheeb cais?
Kev piav qhia cov txheeb cais yog siv los piav lossis piav qhia cov yam ntxwv ntawm cov qauv lossis cov ntaub ntawv, xws li qhov sib txawv qhov txhais tau tias, tus qauv sib txawv, lossis zaus. Inferential txheeb cais tuaj yeem pab peb nkag siab txog cov khoom sib sau ntawm cov ntsiab lus ntawm cov qauv ntaub ntawv.
Ib yam twg tuav cov ribosomal subunits ua ke?
Txhua chav tsev ribosomal muaj RNA nucleotide molecules thiab lawv cov proteins cuam tshuam. Thaum ob lub subunits no koom ua ke, nws tsim cov ribosomes nquag ntawm kev sib txuas ntawm cov protein. Qhov kev koom ua ke ntawm ob lub subunits no tsuas yog ua los ntawm magnesium ions tam sim no hauv cell.
Dab tsi yog ribosomal subunits ua los ntawm?
Ribosomal subunits yog tsim los ntawm ribosomal RNA (rRNA) thiab proteins. Ribosomal subunits nrog S-nqi sib txawv yog tsim los ntawm cov molecules sib txawv ntawm rRNA, nrog rau cov protein sib txawv. Nco ntsoov tias RNA yog ib qho polymer ntawm ribonucleotides uas muaj nitrogenous puag adenine, uracil, guanine, los yog cytosine.
Cov ribosomal subunits ua li cas?
Eukaryote ribosomes yog tsim thiab sib sau ua ke hauv cov nucleolus. Ribosomal proteins nkag mus rau lub nucleolus thiab ua ke nrog plaub rRNA strands rautsim ob lub ribosomal subunits (ib qho me me thiab ib qho loj) uas yuav ua kom tiav ribosome (saib daim duab 1).
