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cell respiration wilk hl ibdp
cell respiration wilk hl ibdp

... complex ; energy is released • Electrons are carried forward from Cytochrome C to Cytochrome c oxidase; energy is released • As a result the more and more H+ ions ( protons) are transferred to the inter membrane space. Cytochrome c oxidase ultimately transfers electrons to Oxygen (terminal e accepto ...
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... intermembrane space, making it positively charged relative to the matrix. • The charge difference across the membrane forces H+ ions through channels in enzymes known as ATP synthases. As the ATP synthases spin, a phosphate group is added to ADP, generating ATP. The Totals Together, glycolysis, the ...
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... 11. From section 6.4, know that cytochromes are oxidases and are components of the electron transport chain. (Why is iron important?) Why do the oxidase test? 11. Know that eukaryotic mitochondrial electron transport chain and prokaryotic electron transport chains are very similar, but no need to me ...
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... Electron Transport and Oxidative Phosphorylation Cristae of inner _______________________ membrane contain molecules that serve as an electron transport system during aerobic respiration. –Electron transport chain consists of _______________________________), coenzyme Q, and cytochromes. –Each ___ ...
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... Cytochrome c is a small (10kda) soluble protein that moves in the space between the inner and outer membranes of mitochondria or bacteria. Carries electrons from cytochrome bc1 to cytochrome oxidase. Cytochrome aa3 (Complex IV); Cytochrome oxidase. A membrane protein with two haem a, and 3 copper a ...
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... doctor for help and is sent to the hospital for some tests. There they discover his mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of his condition? a) ...
< 1 ... 157 158 159 160 161 162 163 164 165 ... 178 >

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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