Lac operon nthuav tawm tsuav yog muaj lactose. Thaum tag nrho cov lactose hloov mus rau hauv qabzib thiab galactose, cov tshuaj tiv thaiv nres.
Ntev npaum li cas cov lac operon tau nthuav tawm thaum muaj lactose?
Lactose operon nthuav qhia tshaj li Lactose tam sim no. Thaum tag nrho cov lactose hloov mus rau hauv qabzib thiab galactose, cov tshuaj tiv thaiv nres….
YPuas yog lac operon qhia thaum muaj lactose?
Lub lac operon ntawm E. coli muaj cov noob koom nrog hauv lactose metabolism. Nws tsuas yog qhia thaum muaj lactose thiab qabzib tsis muaj. Ob tus neeg tswj hwm tig lub operon "rau" thiab "tawm" hauv kev teb rau cov qib lactose thiab qabzib: lac repressor thiab catabolite activator protein (CAP).
Puas operons ib txwm qhia?
Qee cov noob thiab cov neeg ua haujlwm tau hais tawm txhua lub sijhawm Txawm li cas los xij, tseem muaj cov noob uas cov khoom lag luam xav tau los ntawm tes los tswj cov haujlwm tseem ceeb. Cov noob tu vaj tsev no tau nthuav tawm tas li raws li kev loj hlob ib txwm muaj ("ua haujlwm nquag").
Yuav ua li cas lub lac operon tswj?
Txoj Cai ntawm lac Operon
Txoj haujlwm ntawm tus txhawb nqa uas tswj kev qhia ntawm lac operon yog tswj hwm los ntawm ob hom proteins Ib qho ntawm cov proteins tiv thaiv cov RNA polymerase los ntawm transcribing (kev tswj tsis zoo), lwm yam txhim khu kev khi ntawm RNA polymerase rau tus txhawb nqa (kev tswj zoo).
