2. 'a) List the number of NADH and FADH2 equivalents formed and the corresponding number or ATP equivalents generated by mitochondrial oxidation of one molecule of CH3(CH2)12-COSCOA Number of NADH or Number of ATP Enzyme catalyzing the oxidation step FADH, formed ultimately formed B Oxidation Acyl-CoA dehydrogenase B-Hydroxyacyl-CoA dehydrogenase Citric acid cycle Isocitrate dehydrogenase a-Ketoglutarate dehydrogenase Succinyl-CoA synthetase Succinate dehydrogenase Malate dehydrogenase Total "These calculations assume that mitochondrial oxidative phosphorylation produces 1.5 ATP per FADH2 oxidized and 2.5 ATP per NADH oxidized. "GTP produced directly in this step yields ATP in the reaction catalyzed by nucleoside diphosphate kinase (p. 516). For all of the questions below, assume that respiratory activity of mitochondria is supported by CH3(CH2)12-COSCOA in the presence of excess ADP (+ P). (b) How many ATP equivalents will be generated in the presence of the inhibitor rotenone? Give a brief explanation. (c) How many ATP equivalents will be generated by a preparation of mitochondria isolated from skeletal muscle biopsy tissue from a patient with a genetic mutation that causes severe loss of function of the Electron Transfer Flavoprotein (ETF)? Give a brief explanation.
Electron Transport Chain
The electron transport chain, also known as the electron transport system, is a group of proteins that transfer electrons through a membrane within mitochondria to create a gradient of protons that drives adenosine triphosphate (ATP)synthesis. The cell uses ATP as an energy source for metabolic processes and cellular functions. ETC involves series of reactions that convert redox energy from NADH (nicotinamide adenine dinucleotide (NAD) + hydrogen (H)) and FADH2(flavin adenine dinucleotide (FAD)) oxidation into proton-motive force(PMF), which is then used to synthesize ATP through conformational changes in the ATP synthase complex, a process known as oxidative phosphorylation.
Metabolism
Picture a campfire. It keeps the body warm on a cold night and provides light. To ensure that the fire keeps burning, fuel needs to be added(pieces of wood in this case). When a small piece is added, the fire burns bright for a bit and then dies down unless more wood is added. But, if too many pieces are placed at a time, the fire escalates and burns for a longer time, without actually burning away all the pieces that have been added. Many of them, especially the larger chunks or damp pieces, remain unburnt.
Cellular Respiration
Cellular respiration is the cellular process involved in the generation of adenosine triphosphate (ATP) molecules from the organic nutritional source obtained from the diet. It is a universal process observed in all types of life forms. The glucose (chemical formula C6H12O6) molecules are the preferred raw material for cell respiration as it possesses a simple structure and is highly efficient in nature.
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