Video: Dab tsi yog electron pub rau tag nrho cov photosynthesis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov kawg electron txais yog NADP. Hauv cov pa oxygen photosynthesis , thawj electron pub yog dej, tsim oxygen raws li cov khoom pov tseg. Hauv anoxygenic photosynthesis ntau yam electron pub siv. Cytochrome b6f thiab ATP synthase ua haujlwm ua ke los tsim ATP.
Ib yam li ntawd, qhov twg electron los ntawm photosynthesis?
Hluav taws xob yog pauv mus txuas ntxiv ntawm ob lub photosystems, nrog photosystem kuv ua kom tsim NADPH thiab photosystem II ua kom tsim ATP. Txoj kev ntawm hluav taws xob ntws pib ntawm photosystem II, uas yog homologous rau lub photosynthetic qhov chaw tshuaj tiv thaiv ntawm R. viridis twb tau piav qhia.
Dhau li saum toj no, cov kab mob dab tsi ua rau photosynthesis? Nroj tsuag, algae , kab mob thiab txawm ib co tsiaj photosynthesize. Cov txheej txheem tseem ceeb rau lub neej, photosynthesis siv carbon dioxide, dej thiab hnub ci, thiab hloov mus rau hauv qab zib, dej thiab oxygen.
Hauv qhov no, pes tsawg electrons raug xa mus rau hauv photosynthesis?
Thaum NADP+ thiab muaj cov enzyme tsim nyog tam sim no, ob lub ferredoxin molecules, nqa ib qho hluav taws xob txhua, hloov ob electrons rau NADP+, uas khaws cov proton (piv txwv li, hydrogen ion) thiab dhau los ua NADPH.
Nadph tsim li cas?
NADPH yog tsim nyob rau sab stromal ntawm thylakoid membrane, yog li nws tso tawm rau hauv stroma. Nyob rau hauv cov txheej txheem hu ua non-cyclic photophosphorylation (tus qauv "tus qauv" ntawm lub teeb-dependent cov tshuaj tiv thaiv), electrons raug tshem tawm ntawm dej thiab dhau los ntawm PSII thiab PSI ua ntej xaus rau hauv NADPH.
Pom zoo:
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