Video: Vim li cas RNA hloov pauv tseem ceeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev hloov kho Hauv tRNA ua lub luag haujlwm tseem ceeb hauv kev tswj hwm kev txhais lus los ntawm kev txhawb nqa cov qauv, kev sib cuam tshuam ntawm anticodon-codon, thiab kev cuam tshuam nrog enzymes. Anticodon kev hloov kho yog tseem ceeb rau kev txiav txim siab zoo ntawm mRNA.
Cov lus nug tseem yog, lub hom phiaj ntawm kev hloov kho RNA yog dab tsi?
Txhais. Kev hloov kho RNA Kev hloov pauv rau cov tshuaj muaj pes tsawg leeg ntawm ribonucleic acid ( RNA ) molecules post-synthesis uas muaj peev xwm hloov tau muaj nuj nqi los yog stability. Ib qho piv txwv ntawm Kev hloov kho RNA yog qhov sib ntxiv ntawm methylated guanine nucleotide "cap" rau 5'-kawg ntawm tus xa xov RNAs (mRNAs).
Tsis tas li ntawd, vim li cas qhov kev hloov pauv hloov pauv tseem ceeb? Ua li no, ncej - kev sau ntawv Kev ua haujlwm pab txhawb kev ua haujlwm ntawm cov protein synthesis los ntawm kev tso cai tsuas yog cov protein-coding RNA mus rau kev txhais lus. A kev hloov kho kuj tshwm sim ntawm qhov kawg ntawm RNA cov ntawv sau tseg.
Yog li ntawd, RNA hloov pauv li cas?
Introns Splicing RNA splicing yog cov txheej txheem uas intros, thaj tsam ntawm RNA uas tsis code rau cov proteins, raug tshem tawm los ntawm pre-mRNA thiab cov seem exons txuas rau rov tsim ib qho txuas ntxiv mus. Exons yog ntu ntawm mRNA uas dhau los ua "qhia" lossis txhais ua cov protein.
RNA puas tuaj yeem ua methylated?
RNA methylation yog ib tug reversible post-translational hloov kho rau RNA uas epigenetically cuam tshuam ntau yam kab mob lom. Los ntawm kev kho mob RNA Nrog bisulfite, cytosine residues yog deaminated rau uracil thaum tawm hauv 5-methylcytosine lawm.
Pom zoo:
Vim li cas cov hnub qub dhau los ntawm kev hloov pauv hloov pauv?
Stellar evolution yog tus txheej txheem uas lub hnub qub hloov pauv nyob rau lub sijhawm. Cov hnub qub uas muaj tsawg kawg yog ib nrab ntawm lub hnub tuaj yeem pib tsim lub zog los ntawm kev sib xyaw ntawm helium ntawm lawv cov tub ntxhais, thaum lub hnub qub ntau dua tuaj yeem sib xyaw cov ntsiab lus hnyav dua raws li cov khoom sib xyaw ua ke
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Vim li cas qhov tseem ceeb ntawm qhov tseem ceeb?
Thaum koj pom tus nqi kiag li hauv qhov teeb meem lossis qhov sib npaug, nws txhais tau hais tias txhua yam nyob hauv tus nqi tiag tiag yog qhov zoo. Cov txiaj ntsig tsis zoo feem ntau siv rau hauv cov teeb meem cuam tshuam nrog kev nyob deb thiab qee zaum siv nrog qhov tsis sib xws. Qhov ntawd yog qhov tseem ceeb uas yuav tsum nco ntsoov nws zoo li qhov deb ntawm xoom
Vim li cas qhov kev hloov pauv tseem ceeb hauv kev puas siab puas ntsws?
Nws yog ib qho tseem ceeb heev uas cov kev tshawb fawb tuaj yeem rov ua dua, vim tias nws txhais tau tias lwm tus neeg tshawb fawb tuaj yeem sim cov kev tshawb fawb ntawm kev tshawb fawb. Replicability ua rau cov neeg tshawb nrhiav ncaj ncees thiab tuaj yeem ua rau cov neeg nyeem kev ntseeg siab hauv kev tshawb fawb. Yog tias qhov kev tshawb fawb tau rov ua dua, tom qab ntawd cov lus xaus tsis tseeb tuaj yeem pom tias yog qhov tsis yog
Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
Allele frequencies nyob rau hauv ib tug pej xeem yuav hloov vim plaub lub hauv paus zog ntawm evolution: Natural Selection, Genetic Drift, Mutations thiab Gene Flow. Kev hloov pauv yog qhov kawg ntawm cov alleles tshiab hauv cov noob caj noob ces. Ob ntawm cov txheej txheem tseem ceeb tshaj plaws ntawm kev hloov pauv hloov pauv yog: Natural Selection thiab Genetic Drift