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 CoA − SH .

Question

4:45 PM Tue Apr 1 K 77% Problem 9 of 10 Submit Curved arrows are used to illustrate the flow of electrons. Using the provided starting structure, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Then draw any missing organic intermediates or products for this reaction. Include all lone pairs in the structures. Ignore inorganic byproducts, counterions, and solvents. :0: H Select to Add Arrows HI CH3OH H+ ·HO CH3OH, H+ 0:0 H H Select to Add Arrows tion Versirate CH3OH, H* Select to Draw Product

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Question

Chapter 26.9, Problem 2QQ

Interpretation Introduction

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 CoA−SH.

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4:45 PM Tue Apr 1 K 77% Problem 9 of 10 Submit Curved arrows are used to illustrate the flow of electrons. Using the provided starting structure, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Then draw any missing organic intermediates or products for this reaction. Include all lone pairs in the structures. Ignore inorganic byproducts, counterions, and solvents. :0: H Select to Add Arrows HI CH3OH H+ ·HO CH3OH, H+ 0:0 H H Select to Add Arrows tion Versirate CH3OH, H* Select to Draw Product

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