Video: Dab tsi yog peb lub ntsiab lus ntawm kev pib ua haujlwm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
pib complex txhais. Cov complex tsim rau pib ntawm kev txhais lus. Nws muaj 30S ribosomal subunit; mRNA; N-formyl-methionine tRNA; thiab peb pib yam.
Kuj nug, dab tsi yog qhov pib ua haujlwm?
Protein Synthesis thiab Degradation Lub 70S pib complex yog tsim raws li 50S subunit khi thiab GTP yog hydrolyzed. Qhov no pib complex yog ib qho ua tiav ribosome uas muaj fMet tRNA hauv P site, ua raws li AUG codon ntawm mRNA, thiab ribosomal A site npaj tau txais qhov thib ob aminoacyl-tRNA.
Ib yam li ntawd, peb qhov chaw ntawm ribosome yog dab tsi? Hauv cov kab mob, archaea, thiab eukaryotes, qhov tsis zoo ribosome muaj peb kev khi qhov chaw uas accommodate tRNAs: A qhov chaw , tus P qhov chaw , thiab E qhov chaw . Nkag mus aminoacy-tRNAs (tRNA nrog cov amino acid covalently txuas yog hu ua aminoacyl-tRNA) nkag mus rau ribosome ntawm A qhov chaw.
Ntawm no, 3 kauj ruam ntawm 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.
Dab tsi ua rau kev pib ua haujlwm thaum pib txhais lus?
Ib pib complex rau txhais lus Cov ntaub ntawv los ntawm kev sib dhos ntawm ribosomal subunits thiab pib tRNA (met-tRNA) ntawm pib codon ntawm mRNA. Cov pib complex ua tiav.
Pom zoo:
Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?
Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules
Lub ntsiab lus ntawm lub hauv paus lo lus meter nyob rau hauv lo lus tus pas ntsuas kub yog dab tsi?
Lub hauv paus chiv keeb ntawm lo lus 'Thermometer' Qhov thib ob ntawm lo lus, 'meter', los ntawm Fabkis -mètre (uas muaj nws cov hauv paus hauv lub post-classical Latin: -meter, -metrumand lub ancient Greek, -Μέτρο ν, lossis metron, uas txhais tau tias ntsuas qee yam, xws li qhov ntev, qhov hnyav, lossis dav)
Dab tsi yog peb lub hauv paus ntsiab lus uas tso cai rau lub tshuab hluav taws xob ua haujlwm?
Lub tshuab hluav taws xob ua haujlwm ntawm peb lub cev sib txawv: hlau nplaum, electrostatics thiab piezoelectricity. Txog tam sim no, feem ntau yog cov hlau nplaum. Hauv kev sib nqus motors, magnetic teb yog tsim nyob rau hauv ob lub rotor thiab stator
Dab tsi yog qhov txawv ntawm kev txuag hluav taws xob thiab lub hauv paus ntsiab lus ntawm kev txuag hluav taws xob?
Lub caloric txoj kev xav tau khaws cia tias cov cua sov tsis tuaj yeem tsim los yog rhuav tshem, qhov kev txuag ntawm lub zog ua rau lub hauv paus ntsiab lus tsis sib xws uas cov cua sov thiab cov tshuab ua haujlwm sib hloov tau
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces