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C.2 Zwitterion structure of C.3 Glycine ion in base Glycine ion in acid glycine Questions and...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (1). S Н,с NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M NaOH, calculate the...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (I) S H3C...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (I) S H3C O NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning. (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M N2OH, calculate...
Sc : Molecular Modeling (3Dand additional questions. Molecule Structure Glycine :0 W c-NH gic H-O: ek...
Sc : Molecular Modeling (3Dand additional questions. Molecule Structure Glycine :0 W c-NH gic H-O: ek SCI Glutamic Acid OHH HO (nonbonded electrons not shown) H-0- 0- ċ- nd oni ċ- ċ--0-H H HN HH el cul pomi 1. How many of the atoms in glycine and glutamic acid could be considered to be central atoms? TOL Glycine: Glutamic acid: 8 2. What are the molecular geometries of the C and N atoms that have arrows pointing to them in...
Acid & Base 1. Follow the acid & base experiment procedure and answer the following questions 2- Watch t...
Acid & Base 1. Follow the acid & base experiment procedure and answer the following questions 2- Watch the atom viewer for sodium hydroxide and hydrochloric acid then write what you observe. 3. Is sodium hydroxide acid or base and why? 4- Is hydrochloric acid or base and why? 5. Write the dissociation reaction for sodium hydroxide and for hydrochloric acid. 6- What is Unknown Solution 2 in the experiment represents acid or base and why? 7- Write the name...
b) Write the structure of the following compounds (Fischer projection): (D)-serine, (S)-methionine c) Write the structure...
b) Write the structure of the following compounds (Fischer projection): (D)-serine, (S)-methionine c) Write the structure of the following tripeptide: H-Ala-Pro-Phe-OH 2. Determine the N-terminal amino acid of the above tripeptide (H-Ala-Pro-Phe-OH) using the Sanger method (chemical equation). 3. Starting from alanine and glycine synthetize the glycyl-alanine (H-Ala-Gly-OH) dipeptide using mixed anhydride coupling method with Boc (amino) and Bn (carboxyl) protecting groups (reagents, reaction conditions, chemical equations). 4. Starting from the appropriate aldehyde synthetize alanine using the Strecker synthesis (reactions,...
(10) (2) (2) 2. Consider the amino acid, glycine, in its fully protonated form *H3NCH2CO2H, where...
(10) (2) (2) 2. Consider the amino acid, glycine, in its fully protonated form *H3NCH2CO2H, where the pka1 = 2.35 and pka2 = 9.78. a) Kaz is the equilibrium constant for the second dissociation of H3NCH2CO2H. Write the chemical equation that illustrates this equilibrium. b) Write the structure for the major species at pH = 1.35. c) Write the structure for the major species at pH = 3.35. d) Write the structure for the major species at pH = 10.78....
1. draw the structure of amino acid lysine at pH=1.00 and pH=12.00. 2. find the overall...
1. draw the structure of amino acid lysine at pH=1.00 and pH=12.00. 2. find the overall charge of the amino acid at each pH. 3. what will be the overall charge on the peptide alanine-glycine-lysine-serine-aspartate at pH=1.00 and pH=12.00?
Student Name: ID#: Section: 01 2) Lysine is a basic amino acid and has the following...
Student Name: ID#: Section: 01 2) Lysine is a basic amino acid and has the following structure at low pH: (25 points) 0 HN-CH-C OH рка, рКа рКак 2.18 8.95 10.79 (CH2)4 ΝΗ, If this amino acid is titrated with a strong base answer the following questions: 1. Write the dissociation equation for Lysine and show the pH at each dissociation step. [10 pts] 2. Find the charge for the amino acid structure at each dissociation step. [6 pts] 3....
(10) (2) © © eg 2. Consider the amino acid, glycine, in its fully protonated form...
(10) (2) © © eg 2. Consider the amino acid, glycine, in its fully protonated form *H3NCH2CO2H, where the pka1 = 2.35 and pka2 = 9.78. a) Kaz is the equilibrium constant for the second dissociation of *H3NCH2CO2H. Write the chemical equation that illustrates this equilibrium. b) Write the structure for the major species at pH = 1.35. c) Write the structure for the major species at pH = 3.35. d) Write the structure for the major species at pH...
Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon...
Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon that is chiral (i.e., has 4 different groups attached) Chiral compounds rotate plane polarized light Memorize amino acid 1) structure, 2) classification (hydrophobic, aliphatic, aromatic, negatively charged, positively charged, polar uncharged) Be able to draw glycine (the generic amino acid) Given an amino acid structure and pKas of ionizable groups, be able to determine the charge at pH 1, pH 14, and pH 7...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (1). S Н,с NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M NaOH, calculate the...
1. The pKa's of the amino acid methionine are 2.28 and 9.21. The zwitterion of methionine is given below (I) S H3C O NH3 (a) Explain why structure (I) is an intermediate ion. Write balanced chemical reactions to support your reasoning. (b) Draw the conjugate acid AND conjugate base form of the amino acid shown above (c) A 15-mL aliquot solution consisted 0.25M of the zwitterion of methionine and 0.30M of its conjugate acid was titrated with 0.15M N2OH, calculate...
Sc : Molecular Modeling (3Dand additional questions. Molecule Structure Glycine :0 W c-NH gic H-O: ek SCI Glutamic Acid OHH HO (nonbonded electrons not shown) H-0- 0- ċ- nd oni ċ- ċ--0-H H HN HH el cul pomi 1. How many of the atoms in glycine and glutamic acid could be considered to be central atoms? TOL Glycine: Glutamic acid: 8 2. What are the molecular geometries of the C and N atoms that have arrows pointing to them in...
Acid & Base 1. Follow the acid & base experiment procedure and answer the following questions 2- Watch the atom viewer for sodium hydroxide and hydrochloric acid then write what you observe. 3. Is sodium hydroxide acid or base and why? 4- Is hydrochloric acid or base and why? 5. Write the dissociation reaction for sodium hydroxide and for hydrochloric acid. 6- What is Unknown Solution 2 in the experiment represents acid or base and why? 7- Write the name...
b) Write the structure of the following compounds (Fischer projection): (D)-serine, (S)-methionine c) Write the structure of the following tripeptide: H-Ala-Pro-Phe-OH 2. Determine the N-terminal amino acid of the above tripeptide (H-Ala-Pro-Phe-OH) using the Sanger method (chemical equation). 3. Starting from alanine and glycine synthetize the glycyl-alanine (H-Ala-Gly-OH) dipeptide using mixed anhydride coupling method with Boc (amino) and Bn (carboxyl) protecting groups (reagents, reaction conditions, chemical equations). 4. Starting from the appropriate aldehyde synthetize alanine using the Strecker synthesis (reactions,...
(10) (2) (2) 2. Consider the amino acid, glycine, in its fully protonated form *H3NCH2CO2H, where the pka1 = 2.35 and pka2 = 9.78. a) Kaz is the equilibrium constant for the second dissociation of H3NCH2CO2H. Write the chemical equation that illustrates this equilibrium. b) Write the structure for the major species at pH = 1.35. c) Write the structure for the major species at pH = 3.35. d) Write the structure for the major species at pH = 10.78....
Student Name: ID#: Section: 01 2) Lysine is a basic amino acid and has the following structure at low pH: (25 points) 0 HN-CH-C OH рка, рКа рКак 2.18 8.95 10.79 (CH2)4 ΝΗ, If this amino acid is titrated with a strong base answer the following questions: 1. Write the dissociation equation for Lysine and show the pH at each dissociation step. [10 pts] 2. Find the charge for the amino acid structure at each dissociation step. [6 pts] 3....
(10) (2) © © eg 2. Consider the amino acid, glycine, in its fully protonated form *H3NCH2CO2H, where the pka1 = 2.35 and pka2 = 9.78. a) Kaz is the equilibrium constant for the second dissociation of *H3NCH2CO2H. Write the chemical equation that illustrates this equilibrium. b) Write the structure for the major species at pH = 1.35. c) Write the structure for the major species at pH = 3.35. d) Write the structure for the major species at pH...
Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon that is chiral (i.e., has 4 different groups attached) Chiral compounds rotate plane polarized light Memorize amino acid 1) structure, 2) classification (hydrophobic, aliphatic, aromatic, negatively charged, positively charged, polar uncharged) Be able to draw glycine (the generic amino acid) Given an amino acid structure and pKas of ionizable groups, be able to determine the charge at pH 1, pH 14, and pH 7...
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