Video: Puas yog lacI qhia tawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hom kev cai uas lac operon raug xa mus rau qhov tsis zoo inducible, txhais tau hais tias cov noob raug muab tua los ntawm kev tswj hwm (lac repressor) tshwj tsis yog qee cov molecule (lactose) ntxiv. Cov lacI gene coding rau repressor nyob ze lub lac operon thiab yog ib txwm qhia ( tsim nyog ).
Ntawm no, Lac Kuv yog dab tsi?
Lub LacI noob yog txoj cai noob Qhov no code rau lactose-inducible lac operon transcriptional repressor. Hauv lwm lo lus, nws codes rau respressor ntawm te Lac - ua haujlwm. Tsev ua piv txwv. LacI yeej ib txwm sau. Thaum lub repressor khi rau tus neeg teb xov tooj, lub Lac noob tsis tuaj yeem muab luam tawm.
ntev npaum li cas tus lac operon yuav qhia? Cov Lactose operon qhia raws li ntev raws li cov Lactose yog tam sim no. Thaum tag nrho lactose hloov mus rau hauv qabzib thiab galactose, cov tshuaj tiv thaiv nres. vam tias nws yuav pab tau.
Hauv qhov no, OC hauv lac operon yog dab tsi?
2. Oc mutants yog kev hloov pauv hauv DNA ib ntus ntawm tus neeg teb xov tooj uas cuam tshuam rau. kev khi ntawm cov lac tus tsim txom. Yog li ntawd, lub lac operon ua txuam nrog rau Oc tus neeg teb xov tooj tsis tuaj yeem muab tua.
Puas yog lac operon inducible lossis repressible?
Cov lac operon ua yog ib qho piv txwv ua tsis taus pa qhov system. Nrog tsim txom systems, kev khi ntawm cov nyhuv molecule rau lub repressor zoo heev tsub kom qhov kev sib raug zoo ntawm repressor rau tus neeg teb xov tooj thiab tus repressor khi thiab nres transcription.
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