The CO2 produced in one round of the citric acid cycle does not originate in the acetyl carbons that entered that round. If acetyl-CoA is labeled with 14C at its carbonyl carbon, how many rounds of the cycle are required before 14CO2 is released?

Q: If glutamate were labeled with C-14 at the delta-carbon and added via transamination to the citric…

A: Citric Acid Cycle:   is the cyclic metabolic pathway for the oxidation of various intermediates…

Q: Acetly CoA can quickly enter the citric acid cyle by joining with a C4 compound and forming citrate.…

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Q: How many molecules of CO2, NADH, and FADH2 are releasedper pyruvate oxidized in the citric acid…

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Q: Which of the following is a negative regulator of the pyruvate dehydrogenase complex (PDC)?   1.…

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Q: Which one of the five steps of the pyruvate dehydrogenase complex reaction is most likely to be…

A: Pyruvate dehydrogenase complex is a group of non-covalently associated enzymes. It catalyzes…

Q: How many turns of the citric acid cycle are implicated in accounting for the net oxidation of one…

A: The citric acid cycle, which is found to be a part of cellular respiration, takes place inside the…

Q: How many molecules of NADH and FADH2 are obtained from the b-oxidation of one molecule of a…

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Q: The citric acid cycle is a critical sequence of reactions for energy production, which take place in…

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Q: Two glucose molecules undergo ellular respiration. Match the end-products of the citric acid cycle…

A: A series of metabolic processes that occur within a cell in which biochemical energy is extracted…

Q: Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl- COA. Acetyl- CoA is further…

A: Pyruvate dehydrogenase --  Pyruvate dehydrogenase is very important enzyme in respiratory process…

Q: Which of the following is the correct account for acetyl CoA, NADH , and FADH2 for the…

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Q: Which of the following is incorrect about the fifth step (conversion of succinyl-CoA, GDP, and Pi to…

A: Citric acid cycle also known as kreb cycle or TRICARBOXYLIC ACID cycle. Net result of TCA cycle is…

Q: Which enzyme involved in the TCA cycle produces very similar outcomes compared to pyruvate…

A: The citric acid cycle is also known as the Krebs cycle or the tricarboxylic acid cycle. It is a…

Q: Is the statement, "citrate carries acetyl CoA to the mitochondrial matrix which is the site of fatty…

A: Fatty acid biosynthesis is the sequential process that involves in synthesis of long-chain fatty…

Q: The CO2 produced in one round of the citric acid cycle does not originate in the acetyl carbons…

A: The series of chemical reactions that occur inside the living body for the production of energy are…

Q: The number of CO2 molecules liberated for each molecule of acetyl-CoA during oxidative…

A: Tricarboxylic acid (TCA) or Krebs cycle is the oxidative or aerobic part of respiration. This cycle…

Q: If acetyl-CoA is labeled with 14C at its methyl group, how many rounds of the cycle are required…

A: Acetyl CoA is an organic molecule further transformed into oxaloacetate that joins the citric acid…

Q: In fatty acid oxidation, each cycle shortens the fatty acid being catabolised by 2 carbons,…

A: Beta oxidation is the process by which fatty acids are partially oxidized and broken down into a 2…

Q: In the presence of an excess of [14C]acetyl- COA, the metabolic pool of malonyl-CoA becomes labeled…

A: Lipids are the biomolecules that are esters of fatty acids along with alcohol where fatty acids are…

Q: Suppose that aconitase did not bind its substrate asymmetrically. What fraction of the carbon atoms…

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Q: If glucose labeled with radioactive 14C carbon-1 goes through glycolysis and one turn of the citric…

A: Glycolysis is breakdown of glucose into pyruvate. Pyruvate formed is converted to acetyl CoA which…

Q: Starting with acetyl-CoA in the mitochondria, how many ATP molecules are needed to synthesize a 14 C…

A: This question is related to De Novo synthesis of Fatty acid.

Q: The synthesis of acetyl-CoA from pyruvic acid serves as a bridge between which of the following…

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Q: If acyetal-CoA dehydrogenase was unavailable, malonyl-CoA could not be made from aceytal-CoA. That…

A: There is no enzyme called acyetal CoA dehydrogenase or acetyl CoA dehydrogenase. The enzyme that…

Q: ___ molecules of ATP are ultimately formed per every acetyl-CoA that enters the citric acid cycle…

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Q: How many rounds of the TCA cycle are required to expel the indicated carbon atom in the incoming…

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Q: Outline the conditions that direct pyruvate toward the following:(a) Entry into the citric acid…

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Q: Before pyruvate enters the citric acid cycle, it is decarboxylated, oxidized, and combined with…

A: Aerobic respiration is a type of cellular respiration that uses oxygen as a reactant to produce…

Q: A series of chemical reactions convert a polypeptide into 13 acetyl CoAs. This acetyl COA goes into…

A: Acetyl-CoA is generated during the catabolism of amino acids.

Q: How many molecules of acetyl CoA, FADH2, and NADH are produced in the catabolism of a molecule of…

A: Arachidonic acid is a polyunsaturated fatty acid contained in the phospholipids of the body's cell…

Q: The end product of glycolysis, pyruvate, cannot enter as such into the citric acid cycle. Which…

A: In glycolysis process glucose is oxidized into two molecules of pyruvate. Glucose (6 C) is converted…

Q: Which of the following is NOT a fate of pyruvate in metabolism? . Conversion to alanine as its…

A: Pyruvate is the end product of glycolysis that occurs in the cytoplasm of the cell. Pyruvate…

Q: When one acetyl CoA is processed through the citric acid cycle, how many times does each of the…

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Q: Explain the difference of carbohydrate (glycolysis) from lipid (β-oxidation) metabolism in terms of…

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Q: The two main goals of the citric acid cycle are:   (a) citrate synthesis and gluconeogenesis…

A: The citric acid cycle was discovered by H. A. Kreb. The reactions of the citric acid cycle occur in…

Q: Which of the following can undergo metabolic conversion to acetyl CoA and enter the citric acid…

A: Acetyl-CoA (coenzyme A) is an organic compound having two carbon atoms. It is a precursor molecule…

Q: Suppose that aconitase did not bind its substrate asymmetrically. What fraction of the carbon atoms…

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Q: In the glyoxylate cycle, two molecules of acetyl-CoA areconverted into _______________ and malate.

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Q: The citric acid cycle operates only when O2 is present, yet O2 is not a substrate for the cycle.…

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Q: Acetyl-CoA, the TCA Cycle, and the Electron Transport Chain

A: Acetyl-CoA (acetyl coenzyme A) is a molecule  participates in some biochemical reactions in protein,…

Q: In the first step of the TCA cycle the acetyl group of acetyl-CoA is transferred to oxaloacetate to…

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Q: If TWO acetyl CoA enter the citric acid cycle, for each glucose we started with, then how many of…

A: In the process of aerobic respiration, a molecule of glucose is converted to two molecules of…

Q: Does Pyruvate Dehydrogenase Complex have coenzymes and Allosteric regulation?

A: Pyruvate dehydrogenase complex (PDC) is a three-enzyme complex that decarboxylates pyruvate into…

Q: What are the five enzymes (including regulatory enzymes) that constitute the pyruvate dehydrogenase…

A: Introduction: The pyruvate dehydrogenase complex is a three-enzyme complex that transforms pyruvate…

Q: The same reactions that were seen in the process of converting pyruvate to acetyl-S-CoA, occur in…

A: Cellular respiration is a series of metabolic reactions and processes carried out in the cells of…

Q: When the acetyl-CoA produced during β-oxidation in the liver exceeds the capacity of the citric acid…

A: Starting at the carboxyl end, two carbons from acyl-CoA molecules are cleaved at a time in the…

Q: If we label the two carbons composing the acetyl group of acetyl-CoA with 14C, a radioactive isotope…

A: The Krebs cycle is also referred to as the citric acid cycle or TCA (Tricarboxylic acid cycle) and…

Metabolic pathways

Metabolism is defined as the group of life-supporting, enzyme-mediated chemical reactions in organisms. A metabolic pathway is a set of these chemical reactions that involve anabolism (synthesis of complex biomolecules) and catabolism (breakdown of biomolecules into small molecules) that occur inside a cell. Metabolites are the reacting substances, products, and intermediate substances of an enzymatic process that are altered by a series of chemical events catalyzed by enzymes.