-Refer to Exhibit 3A

$$\begin{array}{l}\text { Exhibit } \mathbf { 3 A } \text { (for this chapter) }\\\begin{array} { l l l l } \text { Amino acid } & \boldsymbol { \alpha } \text {-carboxyl group pK a } & \boldsymbol { \alpha } \text {-amino group pK a } & \text { R-group pK } \\\hline \text { Ala } & 2.3 & 9.7 & \\\text { Arg } & 2.2 & 9.0 & 12.5 \\\text { Asn or Gln } & 2.1 & 9.0 & 4.0 \\\text { Asp or Glu } & 2.2 & 9.8 & 8.3 \\\text { Cys } & 1.7 & 10.8 & 6.0 \\\text { His } & 1.8 & 9.2 & \\\text { Ser } & 2.2 & 9.2 & 10.1\end{array}\end{array}$$
-Refer to Exhibit 3A. What is the order of the pIs in increasing order (from acid to base) ?

A) Alanine, Arginine, Asparagine, Cysteine, and Aspartic Acid
B) Aspartic Acid, Alanine, Asparagine, Cysteine, and Arginine
C) Aspartic Acid, Cysteine, Asparagine, Alanine, and Arginine
D) Arginine, Alanine, Asparagine, Cysteine, and Aspartic Acid
E) Aspartic Acid, Cysteine, Arginine, Alanine, and Asparagine,

Correct Answer:

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