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
Homework Answers
d. oxaloacetate
the first step is the transfer of two carbon acetyl groups from acetyl co-A to oxaloacetate to form citrate. if the relative level of oxaloacetate is less then acetyl COA will not enter the citric acid cycle.
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The levels of which metabolite determine whether acetyl COA can
enter the citric acid cycle?
a....
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...
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 +...
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...
Which of the following is an anaplerotic reaction for the citric acid cycle? O conversion of pyruvate to acetyl-CoA...
Which of the following is an anaplerotic reaction for the citric acid cycle? O conversion of pyruvate to acetyl-CoA O conversion of glutamic acid to e-ketoglutarate O conversion of citrate to oxaloacetate and acetyl-CoA conversion of oxaloacetate to pyruvate O conversion of succinyl-Cos to heme
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.
5. In the Citric Acid Cycle, a flavin coenzyme is required for a. Condensation of acetyl-CoA...
5. In the Citric Acid Cycle, a flavin coenzyme is required for a. Condensation of acetyl-CoA and Oxaloacetate. b. Oxidation of Succinate c. Oxidation of Isocitrate. d. Oxidation of Malate. e. Hydration of Fumarate.
_--carbon molecule QUESTION 10 During the citric acid cycle, acetyl CoA covalently binds to oxaloacetate to...
_--carbon molecule QUESTION 10 During the citric acid cycle, acetyl CoA covalently binds to oxaloacetate to form citrate, a A six B four C. five D. two E three
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...
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
8. The citric acid cycle requires acetyl-CoA to begin. Describe how acetyl-CoA is produced for the...
8. The citric acid cycle requires acetyl-CoA to begin. Describe how acetyl-CoA is produced for the citric acid cycle.
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...
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 +...
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...
Which of the following is an anaplerotic reaction for the citric acid cycle? O conversion of pyruvate to acetyl-CoA O conversion of glutamic acid to e-ketoglutarate O conversion of citrate to oxaloacetate and acetyl-CoA conversion of oxaloacetate to pyruvate O conversion of succinyl-Cos to heme
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.
5. In the Citric Acid Cycle, a flavin coenzyme is required for a. Condensation of acetyl-CoA and Oxaloacetate. b. Oxidation of Succinate c. Oxidation of Isocitrate. d. Oxidation of Malate. e. Hydration of Fumarate.
_--carbon molecule QUESTION 10 During the citric acid cycle, acetyl CoA covalently binds to oxaloacetate to form citrate, a A six B four C. five D. two E three
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...
8. The citric acid cycle requires acetyl-CoA to begin. Describe how acetyl-CoA is produced for the citric acid cycle.
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