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Introduction to the study of cell biology
Introduction to the study of cell biology

... protons links to oxidative phosphorylation. When electrons are transported along the chain, the H+ is translocated across the inner membrane. The mitochondrial inner membrane is impermeable to H+ . When protons flow in the reverse direction through the F1-F0 coupling factor complex, the potential ...
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Respiration involves the oxidation of glucose and other compounds

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Chapter 7 Review Name: Date: Question Answer Process that

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untitled file - Blue Earth Area Schools
untitled file - Blue Earth Area Schools

... • ETC located in the inner mitochondrial membrane • High energy electrons enter and move down the chain NAD+ and FAD+ are recycled • H+ pumped out of the matrix to form a gradient • Protons (H+) are allowed back into the matrix, but through an enzyme that converts ADP -- into ATP • The final electr ...
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Document
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... oxaloacetate; losing 2 CO2 ; releasing electrons to yield 3 NADH plus 1 FADH, and one ATP by substrate level phosphorylation. • For one glucose the cycle runs twice. ...
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Electron transport chain



An electron transport chain (ETC) is a series of compounds that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane. This creates an electrochemical proton gradient that drives ATP synthesis, or the generation of chemical energy in the form of adenosine triphosphate (ATP). The final acceptor of electrons in the electron transport chain is molecular oxygen.Electron transport chains are used for extracting energy via redox reactions from sunlight in photosynthesis or, such as in the case of the oxidation of sugars, cellular respiration. In eukaryotes, an important electron transport chain is found in the inner mitochondrial membrane where it serves as the site of oxidative phosphorylation through the use of ATP synthase. It is also found in the thylakoid membrane of the chloroplast in photosynthetic eukaryotes. In bacteria, the electron transport chain is located in their cell membrane.In chloroplasts, light drives the conversion of water to oxygen and NADP+ to NADPH with transfer of H+ ions across chloroplast membranes. In mitochondria, it is the conversion of oxygen to water, NADH to NAD+ and succinate to fumarate that are required to generate the proton gradient. Electron transport chains are major sites of premature electron leakage to oxygen, generating superoxide and potentially resulting in increased oxidative stress.
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