Choose the CORRECT order of reactions that are conducted by photosystem I. P700 is activated by two photons → two Chl A0 accept two high-energy electrons → one quinone A1 is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase takes two protons from the stroma and reduces one NADP+ P680 is activated by two photons → two Chl A0 accept two high-energy electrons → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase oxidizes one ferredoxin at a time to reduce FAD to FADH- and then to FADH2 → the proton-motive force is created P700 is activated by a photon → Chl A0 accepts two high-energy electrons → one plastoquinone QA is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase takes two protons from the stroma and reduces one FAD P700 is activated by a photon → pheophytin accepts two high-energy electrons → two bound plastiquinones are reduced → cytochrome b6f oxidizes plastoquinols to reduce FAD → two protons are pumped to the stroma P680 is activated by a photon → pheophytin accepts one high-energy electron → one mobile plastiquinone is fully reduced → cytochrome b6f oxidizes plastoquinol to reduce FAD → two protons are pumped to the thylakoid lumen

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Choose the CORRECT order of reactions that are conducted by photosystem I.

P700 is activated by two photons → two Chl A₀ accept two high-energy electrons → one quinone A₁ is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP⁺ reductase takes two protons from the stroma and reduces one NADP⁺

P680 is activated by two photons → two Chl A₀ accept two high-energy electrons → two molecules of ferredoxin are reduced → ferredoxin–NADP⁺ reductase oxidizes one ferredoxin at a time to reduce FAD to FADH^- and then to FADH₂ → the proton-motive force is created

P700 is activated by a photon → Chl A₀ accepts two high-energy electrons → one plastoquinone Q_A is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP⁺ reductase takes two protons from the stroma and reduces one FAD

P700 is activated by a photon → pheophytin accepts two high-energy electrons → two bound plastiquinones are reduced → cytochrome b₆f oxidizes plastoquinols to reduce FAD → two protons are pumped to the stroma

P680 is activated by a photon → pheophytin accepts one high-energy electron → one mobile plastiquinone is fully reduced → cytochrome b₆f oxidizes plastoquinol to reduce FAD → two protons are pumped to the thylakoid lumen

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