2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov neeg tswj hwm kev hloov pauv yuav yog cov noob muaj feem cuam tshuam tshwj xeeb hauv kev tswj hwm cov noob qhia los ntawm kev khi ncaj qha raucis-kev tswj hwm cov ntsiab lus. Thaum kawg, lub hom phiaj cov noob tuaj yeem yog txhua hom noob.
Yuav ua li cas cov neeg tswj xyuas kev hloov pauv ua haujlwm li cas?
Nyob rau hauv molecular biology thiab noob caj noob ces, transcriptional regulation yog txhais tau tias los ntawm ib lub xovtooj tswj kev hloov pauv ntawm DNA rau RNA (transcription), yog li orchestrating noob kev ua haujlwm. … Qhov kev tswj xyuas no tso cai rau lub xovtooj ntawm tes los yog kab mob los teb rau ntau yam ntawm intra- thiab extracellular signals thiab yog li mount ib lo lus teb.
Puas yog cov txheej txheem kev hloov pauv kev tswj hwm?
Cov ntsiab lus hloov pauv (TFs) yog tswj hwm cov proteins uas nws txoj haujlwm yog los qhib (lossis tsis tshua muaj, txhawm rau inhibit) kev hloov pauv ntawm DNA los ntawm kev khi rau cov DNA ib ntus. TFs tau txhais cov DNA-binding domains nrog mus txog 10 6-fold ntau dua affinity rau lawv lub hom phiaj sib lawv liag ntawm cov seem ntawm DNA strand.
Yuav ua li cas thiaj tswj tau?
Raws li twb tau tham lawm, kev hloov pauv hauv cov kab mob yog tswj hwm los ntawm kev khi cov proteins rau cis-acting sequences (piv txwv li, tus neeg teb xov tooj lac) uas tswj cov kev hloov pauv ntawm cov noob uas nyob ib sab. Zoo sib xws cis-acting sequences tswj kev qhia ntawm eukaryotic noob.
Tus tswv transcriptional regulator yog dab tsi?
Los ntawm Wikipedia, phau ntawv qhia dawb. Hauv noob caj noob ces, tus tswvregulator yog a noob nyob rau sab saum toj ntawm cov gene regulation hierarchy, tshwj xeeb tshaj yog nyob rau hauv txoj kev tswj hwm ntsig txog txoj hmoo ntawm tes thiab kev sib txawv.
Pom zoo:
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Puas yog jurassic ntiaj teb hloov pauv hloov pauv hloov pauv?
Qee zaum, paub meej, koj yuav tau rov qab mus rau lub sijhawm dhau los - txuag manually, thiab feem ntau, raws li game's autosave yog… tsis zam txim - tab sis feem ntau ntawm cov lub sijhawm koj tuaj yeem khaws cov khoom thiab khaws cia nrog.
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
