Homework Answers
Option b
Explanation : Flavin coenzyme is a redox active enzyme associated with various proteins and involves in several important biochemical reactions.
One well known reaction is he oart of citric acid cycle, succinate dehydogenase requires covalently bound FAD to catalyse the oxidation of succinate to fumarate.
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5. In the Citric Acid Cycle, a flavin coenzyme is required for a. Condensation of acetyl-CoA...
acetyl-CoA COA The reactions of the citric acid cycle are shown in the image. As labeled...
acetyl-CoA COA The reactions of the citric acid cycle are shown in the image. As labeled in the diagram, reactions 1, 3, and 4 are regulation points in the citric acid cycle. oxaloacetate citrate synthase citrate NADH +Hi 7 malate dehydrogenase NAD malate aconitase 2 Which molecule inhibits reaction 1? isocitrate 7 fumarase NAD isocitrate dehydrogenase 3 NADH + H+ O citrate O NAD acetyl-CoA + CO2 fumarate C-ketoglutarate FADH succinate O dehydrogenase FAD O-ketoglutarate a dehydrogenase NAD + COA...
6. In mammals, which of the following does not occur during the citric acid cycle? A)...
6. In mammals, which of the following does not occur during the citric acid cycle? A) formation of a-ketoglutarate. D) metabolism of acetate to carbon dioxide and water. B) net synthesis of oxaloacetate from acetyl-CoA. E) oxidation of acetyl-CoA. C) generation of NADH and FADHz. 7. Which of the following reaction generates GTP(ATP) in the CAC? A) Isocitrate to a-ketoglutarate. D) Fumarate to Malate. B) Malate to Oxaloacetate. E) Succinyl-CoA to Succinate. C) a-ketoglutarate to Succinyl-CoA.
not sure about reaction 3 and 4 acetyl-CoA COA The reactions of the citric acid cycle...
not sure about reaction 3 and 4
acetyl-CoA COA The reactions of the citric acid cycle are shown in the figure Reactions 1, 3, and 4 are regulation points in the citric acid cycle. 1 citrate oxaloacetate 1 synthase citrate NADH + NAD malate dehydrogenase aconitase 2 malate Which of the molecules inhibits reaction 1? Isocitrate HO 17 fumarase NAD socitrate 3 dehydrogenase S D NADP ADP ОАТР O citrate synthase fumarate FADHI succinate co-ketoglutarate dehydrogenase ci-ketoglutarate NAD dehydrogenase +...
Part B Use the structures given in the cycle shown before this part identify the enzymes involved in each step of the citric acid cycle by completing each sentence Match the words in the left column...
Part B Use the structures given in the cycle shown before this part identify the enzymes involved in each step of the citric acid cycle by completing each sentence Match the words in the left column to the appropriate blanks in the sentences on the right. View Available Hint(s) Reset Help isocitrate dehydrogenase aconitase citrate synthase fumarate hydratase succinate dehydrogenase succinyl-CoA synthetase a-ketoglutarate dehydrogenase malate dehydrogenase In step 1, oxaloacetate condenses with acetyl-CoA to form citrate, which is catalyzed by...
The levels of which metabolite determine whether acetyl COA can enter the citric acid cycle? a....
The levels of which metabolite determine whether acetyl COA can enter the citric acid cycle? a. succinate b. a-ketoglutarate c. citrate d. oxaloacetate
Acetyl-CoA labeled with C, as shown, can enter the citric acid cycle. Assuming all the acetyl-CoA...
Acetyl-CoA labeled with C, as shown, can enter the citric acid cycle. Assuming all the acetyl-CoA enters the cycle... 1. What fraction of the label will be present in oxaloacetate at the end of one turn of the cycle? 14 2. Which carbons in the oxaloacetate formed by one turn of the cycle would contain the radioactive label? C4 C3 C2 Ci .What fraction of the original radiolabel present in the acetyl-CoA will be present in oxaloacetate at the end...
the citric acid cycle has 8 enzymes: citrate synthase, aconitase, isocitrase dehydrogenase,.... 1 Jom L C...
the citric acid cycle has 8 enzymes: citrate synthase,
aconitase, isocitrase dehydrogenase,....
1 Jom L C Tegulation TCA cycle (Ch. 16) 1. The citric acid cycle has eight enzymes: citrate synthase, aconitase, isocitrate dehydrogenase, a-ketoglutarate dehydrogenase, succinyl-CoA synthetase, succinate dehydrogenase, fumarase, and malate dehydrogenase. (a) Write a balanced equation for the reaction catalyzed by each enzyme. (b) Name the cofactor(s) required by each enzyme reaction. (c) For each enzyme determine which of the following describes the type of reaction(s) catalyzed:...
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a...
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a succinate dehydrogenase b. a-ketoglutarate dehydrogenase c. succinyl thiokinase d. isocitrate dehydrogenase e. aconitase 2. Which of the listed enzymes of the TCA cycle does not represent a regulatory enzyme?: a. isocitrate dehydrogenase b. succinate dehydrogenase c. malate dehydrogenase d. a-ketoglutarate dehydrogenase complex e. citrate synthase 3. Oxidative decarboxylation of pyruvic acid is regulated by: a. cyclic AMP-dependent mechanism b. cyclic AMP-independent mechanism 4. The...
37. If citric acid cycle enzymes are being inhibited, excess acetyl-CoA cannot be processed in the...
37. If citric acid cycle enzymes are being inhibited, excess acetyl-CoA cannot be processed in the citric acid cycle. This excess acetyl-CoA could be utilized to form A. pyruvate. B. oxaloacetate (OAA). C. fatty acids. A and B all of the above
Molecule G is a four carbon molecule which is formed from the Molecule F a tricarboxylic...
Molecule G is a four carbon molecule which is formed from the Molecule F a tricarboxylic acid after it has gone through oxidative decarboxylations to yield G during citric acid cycle. Molecule F is formed from Molecule E which in turn is formed from Molecules C and D condensation. Molecule C is formed from the oxidative decarboxylation of Molecule A and Molecule D is formed from the oxidation of Molecule X. 1. Molecule X is: A. Alpha-ketoglutarate B. Oxaloacetate C....
acetyl-CoA COA The reactions of the citric acid cycle are shown in the image. As labeled in the diagram, reactions 1, 3, and 4 are regulation points in the citric acid cycle. oxaloacetate citrate synthase citrate NADH +Hi 7 malate dehydrogenase NAD malate aconitase 2 Which molecule inhibits reaction 1? isocitrate 7 fumarase NAD isocitrate dehydrogenase 3 NADH + H+ O citrate O NAD acetyl-CoA + CO2 fumarate C-ketoglutarate FADH succinate O dehydrogenase FAD O-ketoglutarate a dehydrogenase NAD + COA...
6. In mammals, which of the following does not occur during the citric acid cycle? A) formation of a-ketoglutarate. D) metabolism of acetate to carbon dioxide and water. B) net synthesis of oxaloacetate from acetyl-CoA. E) oxidation of acetyl-CoA. C) generation of NADH and FADHz. 7. Which of the following reaction generates GTP(ATP) in the CAC? A) Isocitrate to a-ketoglutarate. D) Fumarate to Malate. B) Malate to Oxaloacetate. E) Succinyl-CoA to Succinate. C) a-ketoglutarate to Succinyl-CoA.
not sure about reaction 3 and 4
acetyl-CoA COA The reactions of the citric acid cycle are shown in the figure Reactions 1, 3, and 4 are regulation points in the citric acid cycle. 1 citrate oxaloacetate 1 synthase citrate NADH + NAD malate dehydrogenase aconitase 2 malate Which of the molecules inhibits reaction 1? Isocitrate HO 17 fumarase NAD socitrate 3 dehydrogenase S D NADP ADP ОАТР O citrate synthase fumarate FADHI succinate co-ketoglutarate dehydrogenase ci-ketoglutarate NAD dehydrogenase +...
Part B Use the structures given in the cycle shown before this part identify the enzymes involved in each step of the citric acid cycle by completing each sentence Match the words in the left column to the appropriate blanks in the sentences on the right. View Available Hint(s) Reset Help isocitrate dehydrogenase aconitase citrate synthase fumarate hydratase succinate dehydrogenase succinyl-CoA synthetase a-ketoglutarate dehydrogenase malate dehydrogenase In step 1, oxaloacetate condenses with acetyl-CoA to form citrate, which is catalyzed by...
Acetyl-CoA labeled with C, as shown, can enter the citric acid cycle. Assuming all the acetyl-CoA enters the cycle... 1. What fraction of the label will be present in oxaloacetate at the end of one turn of the cycle? 14 2. Which carbons in the oxaloacetate formed by one turn of the cycle would contain the radioactive label? C4 C3 C2 Ci .What fraction of the original radiolabel present in the acetyl-CoA will be present in oxaloacetate at the end...
the citric acid cycle has 8 enzymes: citrate synthase,
aconitase, isocitrase dehydrogenase,....
1 Jom L C Tegulation TCA cycle (Ch. 16) 1. The citric acid cycle has eight enzymes: citrate synthase, aconitase, isocitrate dehydrogenase, a-ketoglutarate dehydrogenase, succinyl-CoA synthetase, succinate dehydrogenase, fumarase, and malate dehydrogenase. (a) Write a balanced equation for the reaction catalyzed by each enzyme. (b) Name the cofactor(s) required by each enzyme reaction. (c) For each enzyme determine which of the following describes the type of reaction(s) catalyzed:...
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a succinate dehydrogenase b. a-ketoglutarate dehydrogenase c. succinyl thiokinase d. isocitrate dehydrogenase e. aconitase 2. Which of the listed enzymes of the TCA cycle does not represent a regulatory enzyme?: a. isocitrate dehydrogenase b. succinate dehydrogenase c. malate dehydrogenase d. a-ketoglutarate dehydrogenase complex e. citrate synthase 3. Oxidative decarboxylation of pyruvic acid is regulated by: a. cyclic AMP-dependent mechanism b. cyclic AMP-independent mechanism 4. The...
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