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...
a mutant mammalian liver cell line requires a non-essential amino acid, aspartate, for growth. In this...
a mutant mammalian liver cell line requires a non-essential amino acid, aspartate, for growth. In this cell line, it was found that the glycolytic pathway and TCA cycle are normal, also the aspartate transaminase and PDH complex function normally. If cells from this line are transferred from a medium containing aspartate to one without aspartate, cell growth is arrested and intracellular acetyl-sCoA concentrations increase. The mutant cell line is defective in a. Citrate synthase b. Pyruvate Kinase c. Pyruvate dehydrogenase...
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...
THIS IS BIOCHEMISTRY A peptide has a low pI value. Which of the following amino acids...
THIS IS BIOCHEMISTRY A peptide has a low pI value. Which of the following amino acids are likely to be present? Glycine Serine Valine Aspartic aci Arginine The R-groups of which of the following pairs of amino acids could participate in the formation of salt bridge electrostatic interaction? Alanine and valine Valine and lysine Lysine and glutamate Serine and isoleucine Asparagine and glutamine Which of the following interactions does NOT contribute to stabilizing tertiary structure? Hydrophobic interactions Electrostatic interations...
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?...
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