1. What citric acid cycle intermediate is produced from the 3 carbon propionyl-CoA product formed in the last round of fatty acid oxidation? Propionyl-CoA is formed in the final oxidation round of fatty acids with an odd # of carbons. a) oxaloacetate b) alpha-ketoglutarate c) citrate d) succinyl-CoA
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- If 14CO2 (radioactive carbon) were incorporated into the TCA cycle via the Pyruvate Carboxylase reaction which of the following molecules would contain radioactive carbon? a. Oxaloacetate b. Citric Acid c. Isocitrate d. Alpha-ketoglutarate e. Succinyl-CoA f .Succinate g. Fumarate h. MalateIf glutamate were labeled with C-14 at the delta-carbon and added via transamination to the citric acid cycle to produce alpha-ketoglutarate, how long would it take for the compounds containing C-14 to be reduced by 25% (assume 10 seconds per turn of the cycle)?How many more acetyl CoA are generated from stearic acid than from linoleic acid during beta oxidation?
- identify the reactions of the citric acid cycle that provide reducing power for the electron-transport chain a. conversion of succinyl-CoA to succinate b. conversion of fumarate to malate c. conversion of succinate to fumarate d. conversion of malate to oxaloacetateWhat are the direct products of b oxidation of a fully saturated, straight-chain acyl-CoA of 13 carbons? How many ATP molecules can be obtained from complete oxidation of this compound?If the carbonyl carbon of acetyl-CoA were marked with 14C, where would that carbon be located within oxaloacetate after one turn of the TCA cycle?
- Which of the following statements is/are TRUE for the Krebs' cycle? Reaction 1: condensation of acetyl-CoA and oxaloacetate; produces H20. Reaction 3: oxidation of isocitrate to a-ketoglutarate; produces NADH and CO2. Reaction 6: oxidation of succinate to fumarate; produces FADH2 and CO2 Reaction 5: hydrolysis of succinyl-CoA to succinate; produces ATP.Acetly CoA can quickly enter the citric acid cyle by joining with a C4 compound and forming citrate. Meanwhile, GTP (or ATP) is generated using inorganic phosphate while succinyl CoA is converted to succinate. What is the main reason both acetly CoA and succinyl CoA can perform such work? a. Acetyl CoA and succinyl CoA both contain coenzyme A, which is a high-energy compound. b. Acetyl CoA and succinyl CoA both form an unstable thioester bond with coenzyme A. c. Acetyl CoA and succinyl CoA both bind with inorganic phosphate which is used to generate ATP (or GTP). d. Acetyl CoA and succinyl CoA both transiently form a covalent bond with the enzymes that catalyze the next reaction, pyruvate dehydrogenase and succinyl-CoA synthetase, respectively. e. Acetyl CoA and succinyl CoA use the energy collected from the electron transport chain.How many molecules of acetyl CoA, FADH2, and NADH are produced in the catabolism of a molecule of arachidonic acid, an 20-carbon carboxylic acid? How many times does the spiral reaction sequence occur
- For myristic acid, C 13H 27CO 2H: (a) How many molecules of acetyl CoA are formed from complete β-oxidation? (b) How many cycles of β-oxidation are needed for complete oxidation?The two main goals of the citric acid cycle are: (a) citrate synthesis and gluconeogenesis (b).degradation of acetyl-CoA to produce energy and supply precursors for anabolism (c).degradation of pyruvate to produce energy and supply precursors for anabolism (d).degradation of glucose to produce energy and supply precursors for anabolism (e).degradation of pyruvate to produce energy and synthesize oxaloacetate for gluconeogenesissuccinyl-COA synthetase will do which of the following: Select one: a. Fumarate is combined with water to become Malate b. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH c. Succinate is oxidized to become fumarate forming FADH2 d. Citrate is rearranged to become Isocitrate e. Malate is oxidized to become oxaloacetate forming NADH f. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide g. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH h. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) i. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH