Video: Puas yog kev tswj cov noob hauv eukaryotes koom nrog operons?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Xws li ib pawg ntawm noob nyob rau hauv kev tswj ntawm ib tus neeg txhawb nqa yog hu ua ib qho ua haujlwm . Cov neeg ua haujlwm muaj cov kab mob, tab sis lawv tsis tshua muaj nyob rau hauv eukaryotes xws li tib neeg. Hloov chaw, nws kuj suav nrog tus txhawb nqa thiab lwm yam kev cai sequences tias tswj kev qhia ntawm noob.
Ntawm no, eukaryotes puas muaj operons?
Cov neeg ua haujlwm tshwm sim hauv prokaryotes, tab sis tsis eukaryotes . Hauv eukaryotes , txhua lub noob yog tsim los ntawm ib tus neeg mRNAs thiab txhua tus noob muaj nws tus kheej txhawb nqa. Cov neeg ua haujlwm yog prokaryotic kev npaj ntawm ntau cov noob (nrog rau kev ua haujlwm) nyob rau hauv kev tswj ntawm ib tus neeg txhawb nqa.
Ib sab saum toj no, cov proteins twg koom nrog hauv eukaryotic gene transcription thiab kev cai? Txawm li cas los xij, tsis zoo li cov hlwb prokaryotic, cov eukaryotic tshuaj RNA polymerase xav tau lwm yam cov proteins , los yog kev sau ntawv yam, pab txhawb kev sau ntawv pib. Kev sau ntawv yam yog cov proteins uas khi rau kev txhawb nqa ib ntus thiab lwm yam kev cai sequences los tswj cov kev sau ntawv ntawm lub hom phiaj noob.
Tsis tas li lo lus nug yog, puas yog kev tswj hwm noob ib feem ntawm operon?
Tsis ib txwm suav nrog hauv ua haujlwm , tab sis qhov tseem ceeb hauv nws txoj haujlwm yog a tswj gene , ib txwm qhia noob uas codes rau repressor proteins. Cov tswj gene tsis tas yuav nyob hauv, nyob ib sab, lossis txawm nyob ze ntawm ua haujlwm tswj nws.
Dab tsi tswj cov noob qhia hauv eukaryotes?
Gene qhia hauv eukaryotic cell yog tswj los ntawm repressors thiab los ntawm transcriptional activators. Zoo li lawv cov prokaryotic counterparts, eukaryotic tshuaj repressors khi rau tej DNA ib ntus thiab inhibit transcription. Lwm cov neeg tawm tsam sib tw nrog cov activators rau kev khi rau cov kev cai tshwj xeeb.
Pom zoo:
Dab tsi yog peb txoj hauv kev uas cov hlwb eukaryotic tuaj yeem tswj cov noob qhia?
Eukaryotic gene qhia tuaj yeem tswj tau ntawm ntau theem Chromatin nkag tau. Cov qauv ntawm chromatin (DNA thiab nws cov txheej txheem proteins) tuaj yeem tswj tau. Kev sau ntawv. Kev hloov pauv yog lub ntsiab lus tseem ceeb ntawm kev tswj hwm rau ntau cov noob. Kev ua haujlwm RNA
Dab tsi yog txhais los ntawm cov noob tseem ceeb thiab cov noob caj noob ces?
(Nyob rau hauv cov ntsiab lus ntawm caj ces, ib qho tseem ceeb tshaj plaws yog ib qho uas yog phenotypically qhia hauv heterozygotes). Ib qho tseem ceeb tshaj plaws yog tawm tsam qhov tsis zoo uas tshwm sim tsuas yog thaum muaj ob daim ntawv theej ntawm cov noob. (Nyob rau hauv cov ntsiab lus genetic, ib tug recessive zoo yog ib tug uas yog phenotypically qhia tsuas yog nyob rau hauv homozygotes)
Lub luag haujlwm dab tsi ua Alu cov ntsiab lus ua si hauv kev tswj cov noob hauv tib neeg?
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Puas yog DNA thiab RNA koom nrog hauv cov txheej txheem ntawm cov protein synthesis quizlet?
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Dab tsi yog kev tswj zoo thiab kev tswj tsis zoo hauv gel electrophoresis?
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