Concept explainers
Interpretation: To identify the compound in the form of which oxaloacetate produced during the citric acid cycle operation enters the urea cycle.
Concept introduction: A urea cycle is a cyclic biochemical pathway that involves the production of urea using ammonium ions and aspartate molecules as nitrogen sources. The desired product of the urea cycle is urea. It constitutes 4 steps. In step 1 carbamoyl phosphate transfers its carbamoyl group to ornithine to produce citrulline. Citrulline then condenses with aspartate in the second step to form argininosuccinate which then cleaves in the third step to form arginine and fumarate. In the final step, arginine reacts with water to produce urea.
The citric acid cycle is the third stage of the biochemical energy production process. The cycle includes the reactions in which the acetyl part of acetyl CoA is oxidized and leads to the formation of carbon dioxide and
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Chapter 26 Solutions
General, Organic, and Biological Chemistry
- In the degradation of heme, the iron atom present is released and then a. eliminated from the body in the urine b. captured by the iron-storage protein ferritin c. captured by the B vitamin niacin d. no correct responsearrow_forwardHormone-sensitive lipase needed for triacylglycerol mobilization is activated by a. epinephrine b. cAMP c. adipocytes d. no correct responsearrow_forwardWhich of the following substances are participants in the reactions encompassed by the Cori cycle? a. pyruvate and acetyl CoA b. pyruvate and lactate c. pyruvate, lactate, and acetyl CoA d. no correct responsearrow_forward
- Which of the following citric acid cycle intermediates is a C4 species? a. citrate b. succinate c. -ketoglutarate d. no correct responsearrow_forwardIn which of the following listings of citric acid cycle intermediates are the compounds listed in the order in which they arc encountered in a turn of the cycle? a. isocitrate, oxaloacetate, succinate b. succinate, malate, oxaloacetate c. citrate, oxaloacetate, fumarate d. no correct responsearrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,