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Concept explainers
Interpretation: To identify the process by which fumarate produced during urea cycle operation is processed further.
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.
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Chapter 26 Solutions
Bundle: General, Organic, and Biological Chemistry, 7th + OWLv2 Quick Prep for General Chemistry, 4 terms (24 months) Printed Access Card
- What are the typical fates for fatty acids in the liver (select all that apply)? O They are oxidized and converted into ketone bodies. O They are oxidized to yield acetyl-CoA and NADPH. O They are used to synthesize triacylglycerol. O They are oxidized and converted into glucose. O They are oxidized and used in the synthesis of cholesterol.arrow_forwardIdentify the metabolic transformation that has occurred NH2 Selected Answer: B. Oxidative deamination Answers: A. Oxidative N-dealkylation B. Oxidative deamination C. N-oxidationarrow_forwardCitric Acid Cycle questions a) Since carbons arrive from glucose via acetyl CoA, what carbons from glucose are in Acetyl CoA? Number them in Acetyl CoA using the original number from glucose. b) Are any carbons from acetyl CoA removed as CO2 during the first "turn" of the citric acid cycle? c) What glucose carbon(s) is (are) the first to be removed as CO2 in the citric acid cycle?arrow_forward
- What coenzyme(s) is(are) used in the citric acid cycle? Select one: a.NAD++FADb. FAD only c. FMN d. NAD+ only e.NADH+FADH2+HS−CoA.arrow_forwardQuestion. What is the process of glucose creation from lactate, pyruvate, and amino acids? saccharification glycogenolysis gluconeogenesis glycolysis hydrolysis Question 6 What conformation of B subunits contributes to form ATP? F1 conformation open conformation loose conformation tight conformation O conformationarrow_forward31) Which coenzyme is the electron acceptor in the following reaction? O || - C- OH - -C- H A) FAD B) NAD+ 32) In the chemiosmotic model, protons circulate through a protein complex called A) Complex III. B) ATP synthase. C) FMN. C) NADH D) CoQ. E) Cyt c. D) FADH2 E) FMNarrow_forward
- How is a biochemical pathway different than a biochemical reaction? a) Actually, they are identical. b) Only pathways occur in cells not reactions. c) Only reactions occur in cells not pathways. d) Reactions are catabolic, and pathways are anabolic. e) A pathway is a specific sequence of reactions.arrow_forwardAt what condition would the ATP stop being produced in the electron transport chain? Select the correct answer below: if the function of ubiquinone is inhibited by poison when the proton gradient is affected by ADP in the electron transport chain Both of the above are correct. None of the above are correct.. FEEDarrow_forward15.7) Determine whether each of the following changes is an oxidation or reduction. a) gain of electrons reduction b) loss of electrons oxidation c) Fe²+ to Fe³+ oxidation d) NADH to NAD+ oxidation lost bond to hydrogen atom e) FAD to FADH₂ reduction gained bond to hydrogen atom f) CH4 to CO₂ oxidation gained bonds to oxygen atoms and lost bonds to hydrogen atoms g) NAD+ to NADH reduction gained bond to hydrogen atom EXPLANATION: A useful mnemonic to differentiate oxidation and reduction is the term "OILRIG" (Oxidation is the Loss of electrons; Reduction is the Gain of electrons). It is possible to identify redox reactions for inorganic compounds by inspecting the chemical equation and determining if electrons are transferred from one species to another. If the charge of an atom or ion in a reactant was increased (toward positive) in the conversion of reactants to products, an oxidation occurred. If the charge of an atom or ion in a reactant was decreased (toward negative) in the…arrow_forward
- Three aromatic amino acids F, Y, and W are (). O exclusively keogenic both ketogenic and glucogenic O exclusively glucogenic neither glucogenic nor ketogenic QUESTION 23 If you want to stop ATP synthesis, you will probably add () to the reaction. O urea oligomycin cholera toxin guanidine hydrochloridearrow_forwardChoose the enzyme and cofactors involved in the reaction of oxaloacetate to phosphoenolpyruvate in gluconeogenesis. all K 00 OPO 200 00 C D E glyceraldehyde-3-phosphate dehydrogenase phosphoglycerate kinase pyruvate carboxylase phosphoenolpyruvate carboxykinase Done phosphoglycerate mutasearrow_forward50) Which coenzyme is the electron acceptor in the following reaction? HH II -C- C- A) NADH - C = C- 1 B) NAD+ C) FADH2 D) FMN E) FADarrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
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