Homework Answers
Pyruvate dehydrogenase is an enzyme that catalyzes various biochemical reactions. Almost 20 amino acids can be found in the active site of pyruvate dehydrogenase. The most commonly found amino acid is Aspartate.
Thus, the correct option is A.
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ES 4) The enzyme pyruvate dehydrogenase binds arvate. CH.COYCOO is ctive Which amino acid is most...
There are amino acid residue at the following positions: Arginine - 136 Valine - 58 Glycine...
There are amino acid residue at the following positions: Arginine - 136 Valine - 58 Glycine - 235 Glutamate - 97 Which of the following amino acid substitutions would be least likely to affect the activity of this enzyme? Why? A. Tryptophan at position 235 B. Aspartate at position 58 C. Lysine at position 136 D. Asparagine at position 97
Which amino acid below is most likely to be found at the surface of a protein...
Which amino acid below is most likely to be found at the surface of a protein in its native fold? a) valine b) leucine c)phenylalanine d)lysine Please explain
Which of the following amino acid residues are often involved in proton transfers in enzyme-catalyzed reactions?...
Which of the following amino acid residues are often involved in proton transfers in enzyme-catalyzed reactions? Select one: Histidine, aspartate, lysine, and serine Histidine, aspartate, glutamate, arginine, and lysine. Glutamine, asparagine, lysine, and tyrosine Histidine, aspartate, serine, and cysteine Serine, tyrosine, arginine, and cysteine
options There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The...
options
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH3 NHE ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal...
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH₃ NH₃ Air ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d....
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
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?...
12) Which of the following types of enzyme carries out phosphorylation of a protein? (a) isomerase...
12) Which of the following types of enzyme carries out phosphorylation of a protein? (a) isomerase (b) kinase (c) phosphodiesterase (d) lyase (e) hydrolase 13) Flavin adenine nucleotide is a coenzyme for which of the following? (a) monoamine oxidase (b) trypsin (c) chymotrypsin (d) Na+ K+ ATPase (e) all of the above 14) A noncompetitive inhibitor (a) binds only to [ES] (b) binds either [E] or [ES] (c) binds only to [E] (d) binds only to [S] (15) Which of...
Font Ратауар 15. Excess essential amino acids may be stored as: a) proteins. b) glycogen. c)...
Font Ратауар 15. Excess essential amino acids may be stored as: a) proteins. b) glycogen. c) fats. d) a) and (or just) c, depending on the amino acid. e) b) and (or just) c, depending on the amino acid. 16. Some non-essential amino acids are non-essential because they are made in you but only: a) if certain essential amino acids are present in your diet. b) if pyruvate or certain TCA cycle intermediates are present in your diet. c) if...
31. Which of the following reactions produces a molecule that is directly part of the urea...
31. Which of the following reactions produces a molecule that is directly part of the urea cycle? a) an c-amino acid + pyruvate a a-keto acid + alanine b) a a-keto acid + aspartate → an c-amino acid + oxaloacetate c) oxaloacetate + glutamate → a-ketoglutaric acid + aspartate d) glutamate → a-ketoglutaric acid + ammonia 32. Which of the following reactions produces a molecule that is required for carbamoyl phosphate synthesis? a) an c-amino acid + pyruvatea a-keto acid...
Which of the following amino acid residues are often involved in proton transfers in enzyme-catalyzed reactions? Select one: Histidine, aspartate, lysine, and serine Histidine, aspartate, glutamate, arginine, and lysine. Glutamine, asparagine, lysine, and tyrosine Histidine, aspartate, serine, and cysteine Serine, tyrosine, arginine, and cysteine
options
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH3 NHE ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH₃ NH₃ Air ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
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?...
Font Ратауар 15. Excess essential amino acids may be stored as: a) proteins. b) glycogen. c) fats. d) a) and (or just) c, depending on the amino acid. e) b) and (or just) c, depending on the amino acid. 16. Some non-essential amino acids are non-essential because they are made in you but only: a) if certain essential amino acids are present in your diet. b) if pyruvate or certain TCA cycle intermediates are present in your diet. c) if...
31. Which of the following reactions produces a molecule that is directly part of the urea cycle? a) an c-amino acid + pyruvate a a-keto acid + alanine b) a a-keto acid + aspartate → an c-amino acid + oxaloacetate c) oxaloacetate + glutamate → a-ketoglutaric acid + aspartate d) glutamate → a-ketoglutaric acid + ammonia 32. Which of the following reactions produces a molecule that is required for carbamoyl phosphate synthesis? a) an c-amino acid + pyruvatea a-keto acid...
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