Options for each are lactate, alanine, acetaldehyde, oxaloacetate, and acetyl-CoA.
Homework Answers
(a) Pyruvate decarboxylase is a homotetrameric enzyme that catalyses the decarboxylation of pyruvate to acetaldehyde
(b)Pyruvate carboxylase (PC) encoded by the gene PC is an enzyme of the ligase class that catalyzes (depending on the species) the physiologically irreversible carboxylation of pyruvate to form oxaloacetate (OAA).
(c)Transamination of pyruvate gives alanine
(d)Reduction of pyruvate gives lactate
(e)PDH is a large mitochondrial matrix enzyme complex that catalyzes the oxidative decarboxylation of pyruvate to form acetylCoA
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Options for each are lactate, alanine, acetaldehyde,
oxaloacetate, and acetyl-CoA.
Match the following showing reaction products...
What is the chemical reaction that involves oxaloacetate and acetyl-coa in the tca cycle? a. hydration...
What is the chemical reaction that involves oxaloacetate and acetyl-coa in the tca cycle? a. hydration b. oxidation c. reduction d. hydrolysis e. none of the above
4. (20 points) The reaction of pyruvate to acetyl-CoA and CO2 is the bridge reaction between...
4. (20 points) The reaction of pyruvate to acetyl-CoA and CO2 is the bridge reaction between glycolysis and the citric acid cycle. The carbon atoms in pyruvate are numbered and where they end up in the products are indicated CO0Θ 2 C=O + HS-CoA 3 CH3 Pyruvate S-COA 2C=O 3 CH3 Acetyl CoA Pyruvate dehydrogenase +1 CO2 a) Is C atom 1 in CO2 in a more reduced state or more oxidized state compared to its state in pyruvate? Why?...
1.Predict the effect of a large amount of acetyl-CoA on the activity of pyruvate dehydrogenase and...
1.Predict the effect of a large amount of acetyl-CoA on the activity of pyruvate dehydrogenase and the rate of glycolysis. Note: pyruvate dehydrogenase is the enzyme that catalyzes the formation of acetyl-CoA from pyruvate. a. Pyruvate dehydrogenase activity will decrease while the rate of glycolysis will increase. b. Both pyruvate dehydrogenase activity and the rate of glycolysis will decrease. c. Pyruvate dehydrogenase activity will increase while the rate of glycolysis will decrease. d. The rate of glycolysis will increase, thereby,...
Vitamins participate in metabolic reactions in their coenzyme forms . Match the following reactions to the respective...
Vitamins participate in metabolic reactions in their coenzyme forms . Match the following reactions to the respective vitamins or vitamin-derived coenzymes. - decarboxylation reaction in pyruvate dehydrogenase - isocitrate dehydrogenase - reduction reaction in alpha-KG dehydrogenase - succinate dehydrogenase - malate dehydrogenase - pyruvate carboxylase - activation of acyl- or acetyl- moeities A. thiamine pyrophosphate (TPP) B. biotin C. NAD + D. FAD E....
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
I1. Mammals lack the enzyme a. Lactate dehydrogenase b. Pyruvate kinase Alcohol Dehydrogenase c. d. Pyruvate...
I1. Mammals lack the enzyme a. Lactate dehydrogenase b. Pyruvate kinase Alcohol Dehydrogenase c. d. Pyruvate decarboxylase None of the above are correct e. 12. The first reaction of the Krebs cycle combines Oxaloacetate and Acetyl CoA to make Citrate b. a. Malate and NADH to make Citrate a-ketoglutarate and citrate to make CO2 d. c- Succinate and Citrate to make Oxaloacetate 13. The electrons held by NADH and FADH, are donated to the which complexes in the ETC respectively?...
Match the 6 enzymatic transformations listed above the bins, each with the one reaction it most...
Match the 6 enzymatic transformations listed above the bins, each with the one reaction it most closely Map.. resembles, in terms of mechanism and cofactor(s). Each bin will have exactly one correct answer, and each answer fits best in just one bin. Malate to Oxaloacetate Isocitrate dehydrogenase reaction Succinate to Fumarate Pyruvate to Oxaloacetate Glyoxalate condensation with acetyl-CoA G lycogen phosphorylase 2 AcetylcoA form acetoacetyl-CoA 6 -phosphogluconate to ribulose-5-phosphate Acetyl-CoA to Malonyl-CoA Catabolism of a deoxyribonucleoside to form deoxribose-1-phosphate and...
8. Draw the overall coupled reaction showing the conversion of pyruvate into acetyl CoA. dono STEP...
8. Draw the overall coupled reaction showing the conversion of pyruvate into acetyl CoA. dono STEP 2 nach do not ww what are true. Ir raise, change one word in the statement so that it is true. a. The pyruvate produced from glycolysis must be consumed in some way or glycolysis stops. b. Glycolysis produces ATP directly. too C. Glycolysis breaks down glucose into acetyl CoA. d. Glycolysis is aerobic
The product of the complete oxidation of carbon in the TCA cycle is: a. oxaloacetate b....
The product of the complete oxidation of carbon in the TCA cycle is: a. oxaloacetate b. acetyl coa c. citrate d. CO2 e. None of the above In addition to glucose which of the following sugars can enter glycosis a. celobiose b. ribose c. galactose d. b & c e. all of the above In anaerobic metabolism, what is the fate of pyruvate produced by glycolysis a. converted to ethanol b. converted to lactate c. converted to acetyl-COA d. a...
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...
4. (20 points) The reaction of pyruvate to acetyl-CoA and CO2 is the bridge reaction between glycolysis and the citric acid cycle. The carbon atoms in pyruvate are numbered and where they end up in the products are indicated CO0Θ 2 C=O + HS-CoA 3 CH3 Pyruvate S-COA 2C=O 3 CH3 Acetyl CoA Pyruvate dehydrogenase +1 CO2 a) Is C atom 1 in CO2 in a more reduced state or more oxidized state compared to its state in pyruvate? Why?...
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
I1. Mammals lack the enzyme a. Lactate dehydrogenase b. Pyruvate kinase Alcohol Dehydrogenase c. d. Pyruvate decarboxylase None of the above are correct e. 12. The first reaction of the Krebs cycle combines Oxaloacetate and Acetyl CoA to make Citrate b. a. Malate and NADH to make Citrate a-ketoglutarate and citrate to make CO2 d. c- Succinate and Citrate to make Oxaloacetate 13. The electrons held by NADH and FADH, are donated to the which complexes in the ETC respectively?...
Match the 6 enzymatic transformations listed above the bins, each with the one reaction it most closely Map.. resembles, in terms of mechanism and cofactor(s). Each bin will have exactly one correct answer, and each answer fits best in just one bin. Malate to Oxaloacetate Isocitrate dehydrogenase reaction Succinate to Fumarate Pyruvate to Oxaloacetate Glyoxalate condensation with acetyl-CoA G lycogen phosphorylase 2 AcetylcoA form acetoacetyl-CoA 6 -phosphogluconate to ribulose-5-phosphate Acetyl-CoA to Malonyl-CoA Catabolism of a deoxyribonucleoside to form deoxribose-1-phosphate and...
8. Draw the overall coupled reaction showing the conversion of pyruvate into acetyl CoA. dono STEP 2 nach do not ww what are true. Ir raise, change one word in the statement so that it is true. a. The pyruvate produced from glycolysis must be consumed in some way or glycolysis stops. b. Glycolysis produces ATP directly. too C. Glycolysis breaks down glucose into acetyl CoA. d. Glycolysis is aerobic
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...
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