14Carbon label was detected in Carbon dioxide with 3 turns of citric acid cycle. Where was...
14Carbon label was detected in Carbon dioxide with 3 turns of citric acid cycle.
Where was the radiolable in acetyl Coenzyme A? why?
Where was the radiolable in pyruvate?why?
Homework Answers
There was no radiolabel in acetyl coenzyme A because it is formed by the decarboxylation of pyruvate, the carboxyl group of which actually contains radiolabel. The reaction is shown below.
CH3-CO-14COO- + NAD+ + H-CoA ----> CH3-CO-CoA + NADH + 14CO2
The carboxyl group of pryvate contains the radiolabel, as shown above.
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14Carbon label was detected in Carbon dioxide with 3 turns of
citric acid cycle.
Where was...
takes place and most --- The mitochondria are the location where produced citric acid cycle; acetyl...
takes place and most --- The mitochondria are the location where produced citric acid cycle; acetyl coenzyme A O citric acid cycle; ATP digestion; fatty acid digestion; ATP digestion; acetyl coenzyme A
You are carrying out an experiment in the lab to study the citric acid cycle. To do this, you add 14C-labeled pyruvate at carbon 3 (this is the methyl carbon) to metabolically active mitochondria. Bas...
You are carrying out an experiment in the lab to study the citric acid cycle. To do this, you add 14C-labeled pyruvate at carbon 3 (this is the methyl carbon) to metabolically active mitochondria. Based on your knowledge of the citric acid cycle, what is the location of the 14C-label in oxaloacetate after one turn of the cycle? How many turns of the cycle are required to release all of the14C-label as CO2? Be sure to justify your answers by...
How many turns of the citric acid cycle are implicated in accounting for the net oxidation...
How many turns of the citric acid cycle are implicated in accounting for the net oxidation of each of the following compounds to carbon dioxide and water: (a) glucose, (b) glyceralde-hyde, (c) citric acid, (d) succinic acid?
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...
Draw the complete TCA cycle (Krebs or Citric acid cycle). Show the entry of acetyl- COA...
Draw the complete TCA cycle (Krebs or Citric acid cycle). Show the entry of acetyl- COA and the eight intermediates. Draw the chemical structures of each compound. Show the control point(s) in the pathway. Show where all CO2 is released and label the reactions where oxidation of carbon occurs.
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
Which of the following is not a net product of the citric acid cycle for each...
Which of the following is not a net product of the citric acid cycle for each molecule of pyruvate generated in glycolysis? Select one: a. 1 ATP (GTP) b. 1 acetyl coA c. 3 NADH d. 1 FADH2 Question 2 Which of the following is NOT an end product for an acetyl group that enters the citric acid cycle? Select one: a. ATP b. NADH c. FADH2 d. oxaloacetate Question 3 Once they have been processed through the citric acid...
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
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.
You are exhaling carbon dioxide right now. Where is this carbon dioxide originating from? lost in...
You are exhaling carbon dioxide right now. Where is this carbon dioxide originating from? lost in the TCA/Citric acid cycle. From the reactions in glycolysis. From the electron transport chain in the mitochondria. You are exhaling the carbon dioxide you inhaled but didn’t use.
takes place and most --- The mitochondria are the location where produced citric acid cycle; acetyl coenzyme A O citric acid cycle; ATP digestion; fatty acid digestion; ATP digestion; acetyl coenzyme A
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...
Draw the complete TCA cycle (Krebs or Citric acid cycle). Show the entry of acetyl- COA and the eight intermediates. Draw the chemical structures of each compound. Show the control point(s) in the pathway. Show where all CO2 is released and label the reactions where oxidation of carbon occurs.
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
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.
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