6. The five steps involved in conversion of pyruvate to acetyl-CoA are listed below. Foreach step, list the enzyme(s) that are involved.1. Decarboxylate pyruvate2. Reduction of lipoic acid3. Transfer of acetyl group to coenzyme A4. Reoxidation of lipoic acid5. Reoxidation of FADH2 → FAD

The glucose molecules are metabolized through the glycolytic pathway to synthesize energy (ATP and…

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Biology 2e

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Chapter7: Cellular Respiration

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Problem 9RQ: GTP or ATP is produced during the conversion of isocitrate into ketoglutarate succinyl CoA into...

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GTP or ATP is produced during the conversion of isocitrate into ketoglutarate succinyl CoA into succinate fumarate into malate malate into oxaloacetate
Before pyruvate enters the citric acid cycle, it is decarboxylated, oxidized, and combined with coenzyme A, forming acetyl CoA, carbon dioxide, and one molecule of (a) NADH (b) FADH2 (c) ATP (d) ADP (e) C6H12O6
1. What molecule are released in the formation of alpha- ketoglutarate into succinyl CoA? A. fad - fadh + h20 B. Fad- fadh C. Nadh+ co2 D. Acetl coa + co2 2.fad is reduced in which of the reaction of the krebs cycle? 3. How many nadh and fadh2 molecules are prodcues respectively during one turn of the citric acid cycle? 4. Acetyl coa is formed from pyruvate by ___ reaction. 5. What enzyme un the ETC is responsibke for generating the atp molecules?
1) Which of the following is NOT TRUE following β-oxidation in the liver? a) The formation of propionyl CoA could lead to the production of glucose from B-oxidation b) The formation of acetyl CoA could lead to ketone bodies synthesis c) Acetyl CoA could be converted to pyruvate allowing for the production of glucose d) Acetyl CoA could be used for the synthesis of HMG CoA e) Acetyl CoA might be oxidized by the TCA cycle 2) When undergoing strenuous exercise the Cahill cycle is functioning. Which of the following substrates is being delivered to the liver tissue as part of this cycle? A. Glucose B. Lactate C. Galactose D. Pyruvate E. Alanine
1. Select the INCORRECT statement about Glutamate dehydrogenase : a. Catalyzes the removal of NH4+ into glutamate b.Catalyzes the incorporation of NH*4 into a-ketoglutarate c. Catalyzes the removal of NH*4 from glutamate C d. Catalyzes the incorporation of NH'4 into a-keto acid
3. How is acetyl coA carboxylase being regulated?
5. Which of the following enzymes does not take part in the TCA cycle?    Fumarase.  Succinyl-CoA synthetase.   Aconitase.  Malate dehydrogenase.   Phosphoglycerate mutase.
In Yeast, pyruvate can be directly converted into: A. acetyl-CoA and ethanol B. acetyl-CoA only C. lactate only D. ethanol only
4. If lots of acetyl-CoA is being formed in the mitochondrial matrix, a particular compound will be exported into the cytosol. a.What compound is this? b. What effect does this compound have on fatty acid synthesis? c. How does the compound produce this effect?
A fatty acid (a long straight-chain carboxylic acid with an even number of carbons) is metabolized to acetyl- CoA, which can then enter the citric acid cycle to be further metabolized (Section 24.9). A fatty acid with anodd number of carbons is metabolized to acetyl-CoA and one equivalent of propionyl-CoA. Propionyl-CoA cannot enter the citric acid cycle. Two coenzyme-requiring enzymes are needed to convert it to succinyl-CoA, acompound that can enter the citric acid cycle. Write the two enzyme-catalyzed reactions and include the names of the required coenzymes.
1. Which of the following TCA cycle intermediates is also a metabolite in gluconeogenesis? a. Oxaloacetate b. Pyruvate c. Citrate d. Succinate e. Succinyl CoA
1. Under anaerobic conditions where does the NAD⁺ necessary for the complete oxidation of glucose come from? a. oxidation of acetaldehyde b. reduction of pyruvate c. reduction of lactate d. oxidation of ethanol

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6. The five steps involved in conversion of pyruvate to acetyl-CoA are listed below. For each step, list the enzyme(s) that are involved. 1. Decarboxylate pyruvate 2. Reduction of lipoic acid 3. Transfer of acetyl group to coenzyme A 4. Reoxidation of lipoic acid 5. Reoxidation of FADH2 → FAD