1. What is the possible identity of the amino acid? [ Select] V 2. What is the isoelectric point of the amino acid? [ Select] 3. What is the pKa corresponding to the deprotonation of the alpha-carboxyl group? [Select] 4. Region/ point where the amino acid is predominantly present as a (-1)-charged species. [ Select] 5. The effective buffering range for the amino acid in the basic region. [Select] 6. Region/point where the solution has a 50:50 percent mixture of the (0) and (+1). [Select]

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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Choices for no. 1: aspartate, glutamine, valine, arginine

Choices for no. 2: 2.1, 5.8, 9.0, 10.9, 12.8

Choices for no.3: 2.1, 5.8, 9.0, 10.9, 12.8

Choices for no. 4: A, B, C, D, E, F, G

Choices for no. 5: 1.1-3.1, 4.8-6.8, 8.0-10.0, 9.9-11.9

Choices for no. 6: A, B, C, D, E, F, G

A 100 mL of 0.1 M amino acid at pH 1.0, whose pKa for the
protonated amino group is less than the pKa of the R-group, was
titrated with NaOH solution. The pH was monitored, and the
results were plotted on a graph, as shown below. The key points in
the titration are designated A to G.
12
05
B
Moles of OH added per mole amino acid
G
30
Transcribed Image Text:A 100 mL of 0.1 M amino acid at pH 1.0, whose pKa for the protonated amino group is less than the pKa of the R-group, was titrated with NaOH solution. The pH was monitored, and the results were plotted on a graph, as shown below. The key points in the titration are designated A to G. 12 05 B Moles of OH added per mole amino acid G 30
1. What is the possible identity of the amino acid?
[Select]
2. What is the isoelectric point of the amino acid?
[Select]
3. What is the pKa corresponding to the deprotonation of the
alpha-carboxyl group? [Select]
4. Region/ point where the amino acid is predominantly present
as a (-1)-charged species. [Select]
5. The effective buffering range for the amino acid in the basic
region. [Select]
6. Region/point where the solution has a 50:50 percent mixture
of the (0) and (+1). [Select]
Transcribed Image Text:1. What is the possible identity of the amino acid? [Select] 2. What is the isoelectric point of the amino acid? [Select] 3. What is the pKa corresponding to the deprotonation of the alpha-carboxyl group? [Select] 4. Region/ point where the amino acid is predominantly present as a (-1)-charged species. [Select] 5. The effective buffering range for the amino acid in the basic region. [Select] 6. Region/point where the solution has a 50:50 percent mixture of the (0) and (+1). [Select]
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