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09 Respiration
09 Respiration

... the knob region, activating catalytic sites where ADP and inorganic Fig. 9.14 phosphate combine to ATP. Copyrightmake © 2002 Pearson Education, Inc., publishing as Benjamin Cummings ...
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... • This requires energy from 2 ATP‘S, which have to be borrowed from the cell. • Also, the Hydrogen from glucose is added to the electron carrier NAD+. H+ is added to NAD+ to become NADH. This is called a reduction. (gain of electrons) • The PRODUCTS of Glycolysis are: • 2 ATP, 2 NADH & 2 PYRUVATES • ...
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... 3. Describe the function of nicotinamide adenine dinucleotide (NAD+) and flavin adenine dinucleotide (FAD+) and how they can be oxidized and reduced. How are these two molecules written when they are reduced? Exactly how do they carry electrons? 4. Name the three parts of cellular respiration and wr ...
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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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