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QUESTION 13 Titration of amino acids by a strong base, for example NaOH, results in two pks. The reaction occurring for the pk2 is correctly represented by which of the following reactions? Recall, Pky referes to titrotion of - NH2 + OH - NH+ H20 -COOH • NH2 - -Co0 + NH2* -coo + NH3 - -COOH + NH2 O COOH • OH - -COO+ H2O O- NH3• OH - -NH2 • H20

QUESTION 13 Titration of amino acids by a strong base, for example NaOH, results in two pks. The reaction occurring for the pk2 is correctly represented by which of the following reactions? Recall, Pky referes to titrotion of - NH2 + OH - NH+ H20 -COOH • NH2 - -Co0 + NH2* -coo + NH3 - -COOH + NH2 O COOH • OH - -COO+ H2O O- NH3• OH - -NH2 • H20

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Question 13
1 2 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 3 QUESTION 13 Titration of amino acids by a strong base, for example NaOH, results in two pks. The reaction occurring for the pk is correctly represented by which of the following reactions? Recall, Pky referes to titration of - NH2 + OH - -NH+ H20 -COOH + NH2 - -cO0 + NH2* -coO + NH3* - -COOH + NH2 -COOH + OH - -COO+ H2O - NH3 + OH - -NH2 + H20 QUESTION 14 The pks of histidine for a-carboxylate =1.8; for a-amino =9.33; and for imidazole (side chain) =6.00. At pH 4, the charges on histidine would be as follows: O-1a-carboxylate: +1 a-amino, O imidazole, 0 net charge 1a-amino; +1 imidazole; +2 net charge +1 a-carboxylate; +1 a-amino; +1 imidazole; +3 net charge O-1 a-carboxylate, +1 a-amino, +1 imidazole; +1 net charge -1 a-carboxylate; 0 a-amino; +1 imidazole; 0 net charge QUESTION 15 The side chain of would become hydrophobic if its amino group is removed. O tyrosine O tryptonbane it. Click Save All Ansuers to save all ansuers. Save All Answers Close 3H Q O! 7 Shudent Spport MyCourses
Transcribed Image Text:1 2 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 3 QUESTION 13 Titration of amino acids by a strong base, for example NaOH, results in two pks. The reaction occurring for the pk is correctly represented by which of the following reactions? Recall, Pky referes to titration of - NH2 + OH - -NH+ H20 -COOH + NH2 - -cO0 + NH2* -coO + NH3* - -COOH + NH2 -COOH + OH - -COO+ H2O - NH3 + OH - -NH2 + H20 QUESTION 14 The pks of histidine for a-carboxylate =1.8; for a-amino =9.33; and for imidazole (side chain) =6.00. At pH 4, the charges on histidine would be as follows: O-1a-carboxylate: +1 a-amino, O imidazole, 0 net charge 1a-amino; +1 imidazole; +2 net charge +1 a-carboxylate; +1 a-amino; +1 imidazole; +3 net charge O-1 a-carboxylate, +1 a-amino, +1 imidazole; +1 net charge -1 a-carboxylate; 0 a-amino; +1 imidazole; 0 net charge QUESTION 15 The side chain of would become hydrophobic if its amino group is removed. O tyrosine O tryptonbane it. Click Save All Ansuers to save all ansuers. Save All Answers Close 3H Q O! 7 Shudent Spport MyCourses
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