Video: Yuav ua li cas lac operon ua haujlwm quizlet?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog lactose yog tam sim no, nws khi rau thiab inactivates tus repressor los ntawm ua rau nws poob tawm tus neeg teb xov tooj. Cov ua haujlwm yog induced thaum lactose molecules khi rau repressor protein. Yog li ntawd, cov protein repressor poob nws cov duab thiab ntog tawm ntawm tus neeg teb xov tooj cheeb tsam.
Ua raws li qhov kev pom no, lac operon ua haujlwm li cas?
Cov lac operon ua ntawm E. coli muaj cov gene koom nrog lactose metabolism. Ob tug regulators tig lub ua haujlwm "on" thiab "off" nyob rau hauv teb rau lactose thiab qib qabzib: cov lac repressor thiab catabolite activator protein (CAP). Cov lac repressor ua raws li ib tug lactose sensor.
Tsis tas li ntawd, kev ua haujlwm ntawm lac operon hauv E coli quizlet yog dab tsi? Cov lac operon hauv E . coli tswj cov noob qhia ntawm cov enzymes uas zom lactose hauv cell. Hauv qhov tsis muaj lactose , cov lac operon ua yuav tua thiab gene qhia yuav inactivated.
Kuj nug, lac operon quizlet yog dab tsi?
ib ua haujlwm uas yuav tsum tau rau kev thauj thiab metabolism ntawm lactose . Nws muaj peb hom kab ke uas nyob ib sab. transcription ntawm no ua haujlwm tsis tshwm sim nyob rau hauv lub xub ntiag ntawm qabzib.
Lub luag haujlwm ntawm cov khoom ntawm LacZ gene hauv lac operon quizlet yog dab tsi?
1) LacZ Gene : Encodes rau Beta Galactosidase , uas catabolizes lactose rau hauv nws cov suab thaj thiab pab tsim Allolactose, inducer rau cov Lac Operaon.
Pom zoo:
Yuav ua li cas yuav tsum tshwm sim rau transcription ntawm lac operon?
Dab tsi ntawm cov hauv qab no yuav tsum tshwm sim rau kev hloov pauv ntawm cov noob lac operon coj qhov chaw? Cov protein repressor khi rau DNA molecule, thiab RNA polymerase poob. Lactose raug tshem tawm ntawm lub cev. Lub repressor protein poob tawm ntawm DNA molecule, thiab RNA polymerase khi rau tus txhawb nqa
Yuav ua li cas feem ntau yuav tshwm sim yog tias cov ribosomes hauv lub cell tsis ua haujlwm?
Ribosomes yog organelles uas tsim cov proteins. Cells siv cov protein los ua cov haujlwm tseem ceeb xws li kho cov cellular puas thiab coj cov txheej txheem tshuaj. Yog tias tsis muaj cov ribosomes no, cov hlwb yuav tsis tuaj yeem tsim cov protein thiab yuav tsis tuaj yeem ua haujlwm zoo
Yog vim li cas trp operon suav hais tias yog ib tug repressible operon?
Lub tryptophan (trp) operon system yog ib hom repressible operon system. Thaum tryptophan tam sim no, nws khi lub trp repressor thiab induces ib tug conformational hloov nyob rau hauv cov protein, ua rau nws khi tus neeg teb xov tooj trp thiab tiv thaiv transcription (operon yog repressed)
Dab tsi yog qhov ua haujlwm ntawm cov noob hauv lac operon ntawm E coli?
Lactose operon ntawm Escherichia coli. Cov noob lacZ, lacY thiab lacA tau sau los ntawm ib tus neeg txhawb nqa (P) uas tsim ib qho mRNA los ntawm peb cov proteins raug txhais. Lub operon yog tswj los ntawm Lac repressor, cov khoom ntawm lacI noob, uas tau sau los ntawm nws tus kheej txhawb nqa (PI)
Cov txheej txheem dab tsi yog lub luag haujlwm rau txoj haujlwm ua haujlwm sib txawv?
Position-effect variegation (PEV) tshwm sim thaum cov noob ib txwm nyob hauv euchromatin yog sib xyaw nrog heterochromatin los ntawm kev hloov kho lossis hloov pauv. Thaum lub ntim ntim heterochromatin kis thoob plaws heterochromatin / euchromatin ciam teb, nws ua rau kev hloov pauv ntawm kev ntsiag to hauv tus qauv stochastic