Video: Dab tsi yog monomer ntawm catalase?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Catalase . Catalase yog homotetrameric heme-muaj enzyme tam sim no nyob rau hauv lub matrix ntawm tag nrho cov peroxisomes. Nws ua rau muaj kev cuam tshuam cov tshuaj tiv thaiv uas hydrogen peroxide hloov mus rau dej thiab oxygen. Cov monomer ntawm tib neeg catalase yog 61.3 kDa hauv molecular loj.
Ib yam li ntawd, tib neeg nug, tus qauv ntawm catalase yog dab tsi?
Catalase (EC 1.11. 1.6) yog ib qho enzyme uas muaj nyob rau hauv cov peroxisomes ntawm mammalian hlwb. Nws yog ib tug tetrameric enzyme uas muaj plaub zoo tib yam, tetrahedrally teem subunits ntawm 60 kDa, txhua tus muaj nyob rau hauv nws active chaw ib heme pawg thiab NADPH.
Ib yam li ntawd, cov qauv thiab kev ua haujlwm ntawm catalase yog dab tsi? Catalase yog ib qho enzyme uas hloov hydrogen peroxide rau hauv dej thiab cov pa oxygen. Enzymes yog cov protein molecules uas muaj cov subunits hu ua amino acids. Amino acids zoo ib yam li kev sib txuas hauv cov saw hlau, thaum cov protein zoo ib yam li cov saw hlau nws tus kheej.
Hauv qhov no, hom enzyme twg yog catalase?
Chr. Catalase yog ib qho enzyme uas muaj nyob rau hauv yuav luag txhua yam kab mob uas muaj sia nyob raug oxygen (xws li kab mob, nroj tsuag, thiab tsiaj txhu). Nws catalyzes lub decomposition ntawm hydrogen peroxide rau dej thiab oxygen. Nws yog ib qho tseem ceeb heev enzyme tiv thaiv lub cell ntawm oxidative puas los ntawm reactive oxygen hom (ROS).
Puas yog catalase yog quaternary qauv?
Cov Catalase qauv muaj plaub qhov tseem ceeb. Qhov thib ob qauv yog lub folding ntawm polypeptide qaum qaum ntawm lub catalase . Lub tertiary qauv yog tag nrho cov duab los ntawm cov amino acids. Cov quaternary qauv yog cov duab tshwj xeeb ntawm cov enzyme vim kev npaj ntawm cov subunits.
Pom zoo:
Dab tsi yog cov hlau nplaum uas ua los ntawm qhov kev npaj ntawm electrons yog dab tsi?
Electrons yog teem rau hauv plhaub thiab orbitals nyob rau hauv ib tug atom. Yog hais tias lawv sau lub orbitals kom muaj ntau spin taw tes rau hauv qab (los yog vice versa), txhua atom yuav ua zoo li ib tug me me hlau nplaum. Thaum ib daim ntawm cov hlau tsis muaj hlau nplaum (lossis lwm yam khoom siv ferromagnetic) raug rau sab nraud magnetic teb, ob yam tshwm sim
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms
Dab tsi yog qhov txawv ntawm instantaneous thiab nruab nrab ceev dab tsi yog qhov piv txwv loj tshaj ntawm kev ceev ceev?
Qhov nruab nrab ceev yog qhov ceev nruab nrab ntawm lub sijhawm. Instantaneous ceev yuav yog qhov ceev txhua qhov muab tam sim ntawd hauv lub sijhawm ntawd, ntsuas nrog lub ntsuas ntsuas lub sijhawm
Dab tsi yog qhov txawv ntawm microevolution thiab macroevolution Dab tsi yog qee qhov piv txwv ntawm txhua tus?
Microevolution vs. Macroevolution. Piv txwv ntawm cov kev hloov microevolutionary no yuav suav nrog kev hloov ntawm hom xim lossis loj. Macroevolution, piv txwv li, yog siv los hais txog kev hloov pauv ntawm cov kab mob uas tseem ceeb txaus uas, dhau sijhawm, cov kab mob tshiab yuav raug suav tias yog hom tshiab nkaus xwb