Qhov Tseem Ceeb Qhov txawv - Oxidative phosphorylation vs Photophosphorylation
Adenosine Tri-Phosphate (ATP) yog qhov tseem ceeb rau kev ciaj sia thiab kev ua haujlwm ntawm cov kab mob nyob. ATP yog lub npe hu ua universal zog txiaj ntawm lub neej. Kev tsim khoom ntawm ATP hauv kev ua neej nyob tshwm sim hauv ntau txoj hauv kev. Oxidative phosphorylation thiab photophosphorylation yog ob lub tswv yim tseem ceeb uas ua rau feem ntau ntawm cov cellular ATP nyob rau hauv lub neej. Oxidative phosphorylation siv cov pa oxygen molecular thaum lub sij hawm synthesis ntawm ATP, thiab nws yuav siv sij hawm qhov chaw nyob ze ntawm daim nyias nyias ntawm mitochondria thaum photophosphorylation siv lub hnub ci ua lub zog qhov chaw rau zus tau tej cov ATP, thiab nws yuav siv sij hawm qhov chaw nyob rau hauv lub thylakoid daim nyias nyias ntawm chloroplast. Qhov sib txawv tseem ceeb ntawm oxidative phosphorylation thiab photophosphorylation yog ATP ntau lawm yog tsav los ntawm electron hloov mus rau oxygen hauv oxidative phosphorylation thaum lub hnub ci tsav ATP ntau lawm hauv photophosphorylation.
Oxidative Phosphorylation yog dab tsi?
Oxidative phosphorylation yog txoj hauv kev metabolic uas tsim ATP siv cov enzymes nrog cov pa oxygen. Nws yog theem kawg ntawm kev ua pa ntawm tes ntawm cov kab mob aerobic. Muaj ob txoj haujlwm tseem ceeb ntawm oxidative phosphorylation; electron thauj saw thiab chemiosmosis. Nyob rau hauv electron thauj saw, nws pab txhawb redox cov tshuaj tiv thaiv uas koom nrog ntau redox intermediates los tsav lub zog ntawm electrons los ntawm electron pub rau electron txais. Lub zog tau txais los ntawm cov tshuaj tiv thaiv redox no yog siv los tsim ATP hauv chemiosmosis. Nyob rau hauv cov ntsiab lus ntawm eukaryotes, oxidative phosphorylation yog nqa tawm nyob rau hauv txawv protein complexes nyob rau hauv lub puab membrane ntawm lub mitochondria. Hauv cov ntsiab lus ntawm prokaryotes, cov enzymes no muaj nyob rau hauv qhov chaw nruab nrab ntawm lub cell.
Cov proteins uas koom nrog hauv oxidative phosphorylation yog txuas nrog ib leeg. Nyob rau hauv eukaryotes, tsib lub ntsiab protein complexes yog siv thaum lub sij hawm electron thauj saw. Qhov kawg electron txais ntawm oxidative phosphorylation yog oxygen. Nws txais ib qho hluav taws xob thiab txo kom tsim dej. Yog li, cov pa oxygen yuav tsum muaj los tsim ATP los ntawm oxidative phosphorylation.
Daim duab 01: Oxidative Phosphorylation
Lub zog uas tso tawm thaum lub sij hawm ntws ntawm electrons los ntawm cov saw hlau yog siv rau hauv kev thauj mus los ntawm protons thoob plaws hauv daim nyias nyias ntawm mitochondria. Lub zog muaj peev xwm no yog coj mus rau qhov kawg protein complex uas yog ATP synthase los tsim ATP. ATP ntau lawm tshwm sim hauv ATP synthase complex. Nws catalyses ntxiv ntawm phosphate pab pawg rau ADP thiab pab txhawb kev tsim ntawm ATP. ATP ntau lawm siv lub zog tso tawm thaum lub sij hawm hloov hluav taws xob yog hu ua chemiosmosis.
YPhotophosphorylation yog dab tsi?
Nyob rau hauv cov ntsiab lus ntawm photosynthesis, cov txheej txheem uas phosphorylates ADP rau ATP siv lub zog ntawm lub hnub ci yog hu ua photophosphorylation. Nyob rau hauv cov txheej txheem no, lub hnub ci activates txawv chlorophyll molecules los tsim ib tug electron pub ntawm siab zog uas yuav tau txais los ntawm ib tug tsawg zog electron txais. Yog li ntawd, lub teeb lub zog cuam tshuam nrog kev tsim ntawm ob lub zog hluav taws xob hluav taws xob pub dawb thiab lub zog hluav taws xob tsawg tsawg. Raws li qhov tshwm sim ntawm lub zog gradient tsim, cov electrons yuav txav los ntawm tus neeg pub dawb mus rau tus neeg txais khoom hauv cyclic thiab tsis yog cyclic. Kev txav ntawm electrons tshwm sim los ntawm cov saw hlau thauj electron.
Photophosphorylation tuaj yeem faib ua ob pawg; cyclic photophosphorylation thiab non-cyclic photophosphorylation. Cyclic photophosphorylation tshwm sim nyob rau hauv ib qho chaw tshwj xeeb ntawm chloroplast hu ua thylakoid membrane. Cyclic photophosphorylation tsis tsim oxygen thiab NADPH. Txoj kev cyclic no pib qhov ntws ntawm cov hluav taws xob mus rau chlorophyll pigment complex hu ua photosystem I. Los ntawm photosystem kuv lub zog hluav taws xob siab tau txhawb nqa. Vim qhov tsis ruaj khov ntawm cov hluav taws xob, nws yuav raug lees txais los ntawm tus neeg txais hluav taws xob uas nyob hauv qis zog. Thaum pib, cov hluav taws xob yuav txav los ntawm ib qho khoom siv hluav taws xob mus rau lwm qhov hauv cov saw hlau thaum siv H + ions hla cov membrane uas ua rau lub zog proton. Qhov no proton motive quab yuam ua rau txoj kev loj hlob ntawm lub zog gradient uas yog siv nyob rau hauv zus tau tej cov ATP los ntawm ADP siv lub enzyme ATP synthase thaum lub sij hawm tus txheej txheem.
Daim duab 02: Photophosphorylation
Hauv cov duab tsis-cyclic photophosphorylation, nws muaj ob lub chlorophyl pigment complexes (photosystem I thiab photosystem II). Qhov no tshwm sim hauv stroma. Nyob rau hauv txoj kev no photolysis ntawm dej, molecule yuav siv qhov chaw nyob rau hauv lub photosystem II uas khaws ob electrons tau los ntawm photolysis cov tshuaj tiv thaiv nyob rau hauv lub photosystem pib. Lub teeb lub zog cuam tshuam nrog kev zoo siab ntawm ib qho hluav taws xob los ntawm photosystem II uas dhau los ntawm cov tshuaj tiv thaiv kab mob thiab thaum kawg hloov mus rau ib qho tseem ceeb molecule tam sim no hauv photosystem II. Cov hluav taws xob yuav txav los ntawm ib lub tshuab txais hluav taws xob mus rau qhov txuas ntxiv ntawm lub zog gradient uas yuav tau txais thaum kawg los ntawm ib lub molecule ntawm oxygen. Ntawm no hauv txoj kev no, ob qho tib si oxygen thiab NADPH raug tsim.
Dab tsi yog qhov zoo sib xws ntawm Oxidative phosphorylation thiab Photophosphorylation?
- Ob txheej txheem tseem ceeb hauv kev hloov hluav taws xob hauv lub neej.
- Ob leeg koom nrog kev siv redox intermediates.
- Nyob rau hauv ob txoj kev, kev tsim cov proton motive quab yuam ua rau kev hloov ntawm H+ ions hla lub membrane.
- Lub zog gradient tsim los ntawm ob txheej txheem yog siv los tsim ATP los ntawm ADP.
- Ob txheej txheem siv ATP synthase enzyme los ua ATP.
Qhov txawv ntawm Oxidative phosphorylation thiab Photophosphorylation yog dab tsi?
Oxidative Phosphorylation vs Photophosphorylation |
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| Oxidative Phosphorylation yog txheej txheem uas tsim ATP siv cov enzymes thiab oxygen. Nws yog theem kawg ntawm kev ua pa aerobic. | Photophosphorylation yog txheej txheem ntawm ATP tsim siv lub hnub ci thaum lub sijhawm photosynthesis. |
| Zog Source | |
| Molecular oxygen thiab qabzib yog lub zog ntawm oxidative phosphorylation. | Hnub ci yog lub zog ntawm photophosphorylation. |
| Oxidative phosphorylation tshwm sim hauv mitochondria | Photophosphorylation tshwm sim hauv chloroplast |
| tshwm sim | |
| Oxidative phosphorylation tshwm sim thaum lub sijhawm ua pa ntawm tes. | Photophosphorylation tshwm sim thaum lub sijhawm photosynthesis. |
| Kawg Electron Acceptor | |
| Oxygen yog qhov kawg electron txais ntawm oxidative phosphorylation. | NADP+ yog qhov kawg electron txais ntawm photophosphorylation. |
Summary – Oxidative phosphorylation vs Photophosphorylation
Kev tsim khoom ntawm ATP hauv kev ua neej nyob tshwm sim ntau txoj hauv kev. Oxidative phosphorylation thiab photophosphorylation yog ob lub tswv yim tseem ceeb uas tsim feem ntau ntawm cov cellular ATP. Nyob rau hauv eukaryotes, oxidative phosphorylation yog nqa tawm nyob rau hauv sib txawv protein complexes nyob rau hauv lub puab membrane ntawm lub mitochondria. Nws koom nrog ntau redox intermediates los tsav lub zog ntawm electrons los ntawm electron donors rau electron acceptors. Thaum kawg, siv lub zog tso tawm thaum lub sijhawm hloov hluav taws xob yog siv los tsim ATP los ntawm ATP synthase. Cov txheej txheem uas phosphorylates ADP rau ATP siv lub zog ntawm lub hnub ci yog hu ua photophosphorylation. Nws tshwm sim thaum lub sij hawm photosynthesis. Photophosphorylation tshwm sim ntawm ob txoj hauv kev loj; cyclic photophosphorylation thiab non-cyclic photophosphorylation. Oxidative phosphorylation tshwm sim hauv mitochondria thiab photophosphorylation tshwm sim hauv chloroplasts. Qhov no yog qhov txawv ntawm oxidative phosphorylation thiab photophosphorylation.
Download PDF Oxidative phosphorylation vs Photophosphorylation
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline lub hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv ntawm Oxidative photophosphorylation thiab photophosphorylation
