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The enzyme phosphofructokinase (PFK) catalyzes the reaction fuctose 6 phosphate and ATP, functions as a tetramer and is regulated by several mechanisms, including allosteric regulation. Based on your knowledge of the homotropic regulation of PFK, draw a curve of the rate of Fructose 1, 6-bisphosphate produced vs. [ATP].
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- Phosphofructokinase (PFK-1) is one of the most regulated enzymes in metabolism. Based on all of the principles we have learned in this class, which of the following would be most likely to be an allosteric activator of PFK-1? a Pyruvate b Acetyl CoA c Citric acid d glucoseHow many ATP are produced from the complete degradation of 1,3-bisphosphoglycerate? the complete degradation of ONE glucose using the malate-aspartate shuttle as your guide.Glucose is converted to pyruvate in glycolysis, yielding a netsynthesis of 2 ATP. In certain cells pyruvate can be reconverted to glucose during gluconeogenesis. How many ATPsare required to convert pyruvate back to glucose?
- The regulation of 1-phosphofructokinase occurs primarily by allosteric effectors, including ATP and ADP. Given that phosphofructokinase activity is necessary for glycolysis to proceed, predict what effect ATP would have. How about ADP?Myristoleic acid is a monounsaturated fatty acid found in small amounts in a variety of foods. Calculate the net ATP yield from the complete β-oxidation of myristoleic acid. The formula of myristoleic acid is shown below (it is assumed that the total ATP production is the same for both saturated and unsaturated fatty acids having the same carbon chain length). CH3-(CH2)3-CHCH-(CH2)7-COOH (Given: The oxidation of one NADH yields 2.5 ATP; the oxidation of one FADH2 yields 1.5 ATP; and the oxidation of one acetyl CoA yields 10 ATP. ) Group of answer choices a. 96 ATP b. 92 ATP c. 94 ATP d. 34 ATP e. 36 ATPThe malate–aspartate shuttle yields about2.5 moles of ATP for each mole of cytosolic NADH. Why doesnature use the glycerol–phosphate shuttle, which yields only about1.5 moles of ATP?
- complex allosteric regulation of the aspartate transcarbamoylase reaction is significant because it links? a) citric acid cycle and catecholamine biosynthesis b)glycolysis and lactic acid fermentation c) opiate with neurotransmitter d) glycolysis and fatty acid metabolism e) amino acid and nitrogenous base metabolismHow many moles of each substrate (a-h in the given figure) are formed during the aerobic metabolism of a glucose molecule? and why is that? ty.The complete oxidation of glucose 6-phosphate derived from free glucose yields 30 molecules ATP, whereas the complete oxidation of glucose 6- phosphate derived from glycogen yields 31 molecules of ATP. Account for this difference.
- During glycolysis, fructose 1,6-biphosphate splits into two compounds: ______________ after reacting with aldolase and _____________Hexokinase catalyzes the first step of glycolysis, in which glucose is phosphorylated to form glucose‑6‑phosphate. Give two reasons why a Mg2+ cation is required to facilitate this reaction.Consider ten glucose molecules that enter a cell. How many ATP can be generated by the complete catabolism of these into CO2 and H2O? If all ten are first incorporated into glycogen, liberated from glycogen, and then fully catabolized into CO2 and H2O, does the ATP tally increase, decrease or stay the same? Consider that 1 UTP = 1 ATP. Explain. Describe the processes which produce ATP and provide a balanced equation of glucose, CO2, H2O and O2