2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
YPyrimidine synthesis tshwm sim hauv
cytoplasm. Pyrimidine yog synthesized li lub nplhaib pub dawb thiab tom qab ntawd ib qho ribose-5-phosphate ntxiv rau cov txiaj ntsig ncaj qha nucleotides, whereas, hauv purine synthesis, lub nplhaib yog tsim los ntawm kev txuas atoms ntawm ribose-5-phosphate.
Yuav ua li cas kauj ruam ntawm pyrimidine biosynthesis tshwm sim hauv mitochondria?
De novo biosynthesis ntawm pyrimidine Nov yog cov kauj ruam tswj hwm hauv pyrimidine biosynthesis hauv cov kab mob. Lub nplhaib tsim thiab Lub cev qhuav dej. Dihydroorotate ces nkag mus rau mitochondria qhov twg nws yog oxidized los ntawm kev tshem tawm ntawm hydrogens. Qhov no tsuas yog mitochondrial kauj ruam hauv nucleotide rings biosynthesis.
Nucleotide synthesis tshwm sim nyob qhov twg hauv cell?
De novo purine nucleotide synthesis tshwm sim nyob rau hauv cytosol ntawm lub siab qhov twg tag nrho cov enzymes tsim nyog muaj tam sim no raws li macro-molecular aggregate.
thawj pyrimidine synthesized yog dab tsi?
thawj kauj ruam hauv de novo pyrimidine biosynthesis yog synthesis ntawm carbamoyl phosphate los ntawm bicarbonate thiab ammonianyob rau hauv ntau txoj kev, yuav tsum tau cleavage ntawm ob molecules ntawm ATP. Cov tshuaj tiv thaiv no yog catalyzed los ntawm carbamoyl phosphate synthetase (CPS) (Tshooj 23.4. 1).
Purine synthesis tshwm sim nyob rau hauv lub cell nyob qhov twg?
Purine biosynthesis tshwm sim hauv cytosol ntawm txhua lub hlwb. Lub nplhaib purine yog tsim los ntawm 11 enzyme catalysedcov kauj ruam. Txhua enzyme yog oligomeric, uas txhais tau hais tias nws muaj ob peb monomers. Cov khoom nruab nrab uas tsim tawm thaum lub sijhawm cov tshuaj tiv thaiv tsis tso tawm.
Pom zoo:
Rau qhov tshwm sim tshwm sim?
Cov tshuaj tiv thaiv tus kheej yogtawm tsam uas nyiam tsim cov khoom ntawm cov xwm txheej uas tshwm sim. … Qhov kev sib xyaw ua ke ntawm kev txo qis ntawm lub zog thiab qhov nce hauv entropy txhais tau hais tias cov tshuaj tiv thaiv combustion tshwm sim tsis tu ncua.
Thaum twg qhov kev rov tshwm sim tshwm sim?
Thaum Replevin tuaj yeem thov Li no, qhov no yog qhov xwm txheej tshwm sim ntau tshaj plaws uas yuav tshwm sim thaum tus neeg siv khoom tsis raug them nyiaj qiv tsheb. Kev ua txhaum cai ntawm kev thaj yeeb nyab xeeb yog me ntsis luv luv. Nws tsis suav nrog kev txeeb tsheb yam tsis tau ceeb toom lossis kub xov tooj kom tsav tsheb mus.
Thaum qhov no yog qhov tshwm sim uas tshwm sim?
Lub hauv paus ntsiab lus ntawm kev mob Nrog qhov tshwm sim (uppada) ntawm qhov no, qhov tshwm sim. Thaum tsis muaj qhov no, qhov ntawd tsis tuaj. Nrog lub cessation (nirodha) ntawm no, uas ceases. - Samyutta Nikaya 12.61. Thaum qhov no yog qhov tshwm sim uas tshwm sim qhov tshwm sim uas tshwm sim thaum qhov no tsis yog qhov tsis yog qhov kev txiav txim siab tsis piav qhia?
Yuav ua li cas txiav txim siab seb qhov kev tshwm sim yog tshwm sim los yog tsis ua raws li txoj cai?
Kev sib xyaw ua lej ntawm kev hloov pauv enthalpy thiab hloov pauv hloov pauv tso cai rau kev hloov pauv ntawm lub zog dawb los suav. A tawm tsam nrog tus nqi tsis zoo rau ΔG tso tawm lub zog dawb thiab yog li nws tus kheej. Cov tshuaj tiv thaiv nrog qhov zoo ΔG yog tsis ua raws li kev xav thiab yuav tsis nyiam cov khoom.
Puas tsis muaj qhov tshwm sim tshwm sim xav tau enzymes?
Tam sim no, enzymes TSIS ua rau cov tshuaj tiv thaiv tsis yog tus kheej. Txawm li cas los xij, enzymes ua kom nrawm nrawm ntawm cov tshuaj tiv thaiv tus kheej. Yeej, lawv ua kom cov tshuaj tiv thaiv sai dua. Enzymes ua qhov no los ntawm kev txo qis kev ua kom lub zog ntawm cov tshuaj tiv thaiv.
