Homework Answers
Add Answer to:
A8 The acid dissociation constants (pKa) of the amino acid aspartic acid are shown below. What is the isoelectric p...
I dont really know how to do this question A8 Two acid dissociation constants (pka) of...
I dont really know how to do this question
A8 Two acid dissociation constants (pka) of the amino acid aspartic acid are shown below. The measured isoelectric point (pl) is 3.0. What is the pka of the carboxylic acid side chain? PK, 9.8 pk, 2.1 *H3N он Questions continue over page
What is the pI value for aspartic acid, which has pKa values of 2.1, 3.9, and...
What is the pI value for aspartic acid, which has pKa values of 2.1, 3.9, and 9.8? The answer is (2.1+3.9)/2 = 3.0 What happen to 9.8?? Why this number is not included?
Aspartic acid has three pKa values, 2.09, 3.86 and 9.82. a. On the following structure for...
Aspartic acid has three pKa values, 2.09, 3.86 and 9.82. a. On the following structure for this amino acid circle the protons that can be removed and indicate the corresponding pKa value? b. Determine the value of the isoelectric point for this amino acid. c. Sketch the structure of the zwitterion. d. If electrophoresis is carried out at pH is 7.0, will this amino acid migrate to the anode(+) or cathode(-).
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 r...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
m ical reactions 8) Which of the following represents an amino acid in a basic solution...
m ical reactions 8) Which of the following represents an amino acid in a basic solution (pH-11)? A) R-CH-COOR -CH-COOH ENH2 R--CH-COOH R-CH-coo C) NH3 D) 3NH3 9) Which of the following is a zwitterion? B) NH2 R-CH-Coo E) NH2 A) R-CH-COO R-ch-cool R-ca-cooH R-ch-coo H2B) NH2C) NH3 D) NH3 R-ca-coo E) NH2 10) Which of the following amino acids has the lowest isoelectric point? A) glutamic acid B) lysine C) valine D) glycine E) methionine 11) Calculate the isoelectric...
The carboxylic acid group (COOH) in the side chain of Aspartic acid (shown below), one of...
The carboxylic acid group (COOH) in the side chain of Aspartic acid (shown below), one of the 20 naturally occurring amino acids, has a pKa of 4.1. Calculate the percentage of conjugate base (COO- ) for this carboxylic acid group in the side chain of Aspartate at the following pH values: 2.1 , 4.1 and 5.1.
Based on the equilibria shown below, what is the net charge on structure IV? This is...
Based on the equilibria shown below, what is the net charge on structure IV? This is a simple problem. Do not overthink it. pk = 2.09 HOQCCH CHCO,H HOCCH CHCO3 *NH *NH II 1 15 PK = 3.86 pk = 9.82 -OCCH_CHCO3- NH2 IV FOCCH2CHCO3- *NH III A) -2 B)-1 C) 0 D) +1 E) +2 At the isoelectric point, the structure of methionine (2-amino-4-methylthiobutanoic acid) is This is a simple problem. Do not overthink it. A) D) CH SCH...
The triprotic form of the amino acid glutamic acid is shown below, along with the pK,...
The triprotic form of the amino acid glutamic acid is shown below, along with the pK, value for each ionizable site. B 9.7 l A 2.2 +H3N— C—C—OH c= 0 OH C 4.3 In the monoprotic form of the molecule, is each of the sites (labeled A, B, and C) protonated or unprotonated? site A:( site B: site C: The triprotic form of the amino acid arginine is shown below, along with the pK, value for each ionizable site. B...
2. (10 points) The structure for the amino acid histidine is shown below (at pH 1)....
2. (10 points) The structure for the amino acid histidine is shown below (at pH 1). Write the chemical equations for the ionic dissociations of histidine (as the pH increases) Determine the isoelectric point for histidine and indicate the structure present at the isoelectric point. The pka values for histidine are 1.82 (-CO2H). 9.17 (NH3'), and 6.00 (R group). OOH "HaN NH "INP
15. Which is used to reduce the disulfide bonds in proteins? D) iodoacetate B) performic acid C) DTT A) PITC 16. Wh...
15. Which is used to reduce the disulfide bonds in proteins? D) iodoacetate B) performic acid C) DTT A) PITC 16. What is the net charge on the tripeptide Gly-Asp-Lys at pH 1.5? The table below gives the pKa's of the ionizable groups on the free amino acids. Free amino acid pK, of a-Carboxyl pKs of side chain pKa of a-amino group 2.4 group 9.8 Glycine Aspartate Lysine 2.0 3.9 9.9 2.2 9.1 10.5 A) -2 B) C) D) +2...
I dont really know how to do this question
A8 Two acid dissociation constants (pka) of the amino acid aspartic acid are shown below. The measured isoelectric point (pl) is 3.0. What is the pka of the carboxylic acid side chain? PK, 9.8 pk, 2.1 *H3N он Questions continue over page
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
m ical reactions 8) Which of the following represents an amino acid in a basic solution (pH-11)? A) R-CH-COOR -CH-COOH ENH2 R--CH-COOH R-CH-coo C) NH3 D) 3NH3 9) Which of the following is a zwitterion? B) NH2 R-CH-Coo E) NH2 A) R-CH-COO R-ch-cool R-ca-cooH R-ch-coo H2B) NH2C) NH3 D) NH3 R-ca-coo E) NH2 10) Which of the following amino acids has the lowest isoelectric point? A) glutamic acid B) lysine C) valine D) glycine E) methionine 11) Calculate the isoelectric...
Based on the equilibria shown below, what is the net charge on structure IV? This is a simple problem. Do not overthink it. pk = 2.09 HOQCCH CHCO,H HOCCH CHCO3 *NH *NH II 1 15 PK = 3.86 pk = 9.82 -OCCH_CHCO3- NH2 IV FOCCH2CHCO3- *NH III A) -2 B)-1 C) 0 D) +1 E) +2 At the isoelectric point, the structure of methionine (2-amino-4-methylthiobutanoic acid) is This is a simple problem. Do not overthink it. A) D) CH SCH...
The triprotic form of the amino acid glutamic acid is shown below, along with the pK, value for each ionizable site. B 9.7 l A 2.2 +H3N— C—C—OH c= 0 OH C 4.3 In the monoprotic form of the molecule, is each of the sites (labeled A, B, and C) protonated or unprotonated? site A:( site B: site C: The triprotic form of the amino acid arginine is shown below, along with the pK, value for each ionizable site. B...
2. (10 points) The structure for the amino acid histidine is shown below (at pH 1). Write the chemical equations for the ionic dissociations of histidine (as the pH increases) Determine the isoelectric point for histidine and indicate the structure present at the isoelectric point. The pka values for histidine are 1.82 (-CO2H). 9.17 (NH3'), and 6.00 (R group). OOH "HaN NH "INP
15. Which is used to reduce the disulfide bonds in proteins? D) iodoacetate B) performic acid C) DTT A) PITC 16. What is the net charge on the tripeptide Gly-Asp-Lys at pH 1.5? The table below gives the pKa's of the ionizable groups on the free amino acids. Free amino acid pK, of a-Carboxyl pKs of side chain pKa of a-amino group 2.4 group 9.8 Glycine Aspartate Lysine 2.0 3.9 9.9 2.2 9.1 10.5 A) -2 B) C) D) +2...
Most questions answered within 3 hours.
-
Write four functions: (IN PYTHON 3)
1) bound(l) - given a list of integers l, compute...
asked 1 minute from now -
A quarterback throws a football. When the football leaves his
hand, it has a horizontal velocity...
asked 6 minutes ago -
he term "reproductive isolation mechanism" refers to
inability of a species to continue reproduction
specific areas...
asked 8 minutes ago -
In a certain binary-star system, each star has the same mass
which is 4.4 times of...
asked 13 minutes ago -
Use the model of the small open economy (Apply the small
open economy model of real...
asked 20 minutes ago -
The structure Car is declared as follows: struct Car { string
carMake; string carModel; int yearModel;...
asked 29 minutes ago -
Consider a transformer with 125 turns of wire in the primary
winding and 1475 turns of...
asked 30 minutes ago -
Let h be the depth below the surface of the ocean at which the
absolute pressure...
asked 31 minutes ago -
Apply the four-stage New Product Development model shown in page
325 of your text book
(Concept...
asked 40 minutes ago -
An enzyme catalyzes the reaction A ⇌ B. The enzyme is present at
a concentration of...
asked 48 minutes ago -
The number of years of education of self-employed individuals in
the United States has a population...
asked 1 hour ago -
Using the TI-84 calculator, find the area under the standard
normal curve that lies outside the...
asked 1 hour ago