Titrations and pI Values Self Test:
The following graph shows the titration curve for leucine:
    

 Question #1: 
What form(s) of leucine is(are) most predominate at point C?

I
I and II
II
II and III
III

Question #2: 
What form(s) of leucine is(are) most predominate at point A?

I
I and II
II
II and III
III

Question #3: 
What form(s) of leucine is(are) most predominate at point D?

I
I and II
II
II and III
III

Question #4: 
What form(s) of leucine is(are) most predominate at point B?

I
I and II
II
II and III
III

Question #5: 
What form(s) of leucine is(are) most predominate at point E?

I
I and II
II
II and III
III

Question #6: 
Which point represents the pI of leucine?

A
B
C
D
E


The following graph shows the titration curve for aspartate:
     

 Question #7: 
What form(s) of aspartate is(are) most predominate at point F?

I
I and II
II
II and III
III
III and IV
IV

Question #8: 
What form(s) of aspartate is(are) most predominate at point B?

I
I and II
II
II and III
III
III and IV
IV

Question #9: 
What form(s) of aspartate is(are) most predominate at point E?

I
I and II
II
II and III
III
III and IV
IV

Question #10: 
What form(s) of aspartate is(are) most predominate at point D?

I
I and II
II
II and III
III
III and IV
IV

Question #11: 
What form(s) of aspartate is(are) most predominate at point G?

I
I and II
II
II and III
III
III and IV
IV

Question #12: 
Which point represents the pI of aspartate?

A
B
C
D
E
F
G

Question #13: 
The pI for methionine is:

2.28
4.56
5.74
9.21
11.49

Question #14: 
The pI for lysine is:

2.18
4.36
5.56
7.22
9.74

Question #15: 
The pI for glutamate is:

1.09
2.19
3.22
5.37
6.96

Question #16: 
The pI for arginine is:

12.48
10.76
7.90
5.60
2.17

Question #17: 
The pI for tyrosine is:

7.13
9.11
9.59
10.07
5.66

Question #18: 
The pI for dipeptide Ala-Pro is:

5.84
6.65
6.24
2.16
10.32

Question #19: 
The pI for dipeptide Asp-Gly is:

2.76
3.00
5.20
6.62
9.60

Question #20: 
The pI for dipeptide Lys-Tyr is:

6.14
9.74
10.30
5.58
9.51

Question #21: 
The pI for tripeptide Glu-Leu-Ser is:

3.23
6.96
5.94
9.64
2.28