The numbered steps below correspond to the numbered steps inthe electron-transport chain animation in Figure 9, in the mainpage of the tutorial. (These are the same as the numbers on theelectron carriers (purple) in Figure 9). We recommend that youview the movie first, and refer to the text below forclarification of the steps in the movie.
Organisms that use cellular respiration, such as humans, use that oxygen to kick-start and propel the reactions of cellular respiration, especially those occurring during the Electron Transport Chain.
Photosynthesis, Electron Transport Chain.
This tutorial has focused on the light-dependent reactions of photosynthesis, or: light + water --> NADPH + ATP; water provided the electrons and protons, resulting in oxygen as a by-product. Light excites the electrons, and it is the original source of energy for every step in the process. The transfer of electrons in the electron transport chain moves protons. This creates a voltage that is used to make ATP. The electrons complete their journey by reducing NADP+ to NADPH.
The electron transport chain of photosynthesis is ..
As photons are absorbed by pigment molecules in the antenna complexes of Photosystem II, excited electrons from the reaction center are picked up by the primary electron acceptor of the Photosystem II electron transport chain.
Biochemistry/Electron Transport Chain - Wikibooks, …
Meanwhile, photons are also being absorbed by pigment molecules in the antenna complex of Photosystem I and excited electrons from the reaction center are picked up by the primary electron acceptor of the Photosystem I electron transport chain. The electrons being lost by the P700 chlorophyll molecules in the reaction centers of Photosystem I are replaced by the electrons traveling down the Photosystem II electron transport chain.
03/06/2017 · Biochemistry/Electron Transport Chain
The electrons transported down the Photosystem I electron transport chain combine with 2H+ from the surrounding medium and NADP+ to produce NADPH + H+
BI 2: Electron Transport Chain & Chemiosmosis by …
Pathways of higher plant photosynthetic electron transport. Higher plant photosynthetic electron transport takes place in the chloroplast in the thylakoid membrane. Linear electron transport starts with the light‐driven splitting of water by photosystem II (PSII), producing oxygen and electrons. These are transferred via plastoquinone (PQ) the cytochrome b/f complex (cyt ) and plastocyanin (PC) to photosystem I (PSI). PSI then reduces ferredoxin (Fd) in a second light‐driven reaction. Ferredoxin may reduce NADP to NADPH, catalysed by ferredoxin NADP oxidoreductase (FNR) or pass electrons back to PQ, probably via the cyt b/f complex. NADPH may be used to produce carbohydrate in the Benson–Calvin cycle or may reduce PQ, via an NADP–PQ oxidoreductase complex (ndh). Electron transport is coupled to the transfer of protons from the chloroplast stroma to the thylakoid lumen. These return to the stroma via ATP synthase, a process coupled to the synthesis of ATP. The pH gradient produced may also lead to downregulation of light harvesting by PSII – a process termed qE.
Respiration and photosynthesis use electron transport chain to ..
As the electrons from the reaction center of Photosystem I are picked up by the electron transport chain, they are transported back to the reaction center chlorophyll.