-Refer to Exhibit 3A

question 21

Multiple Choice

$$\begin{array}{l}\text { Exhibit } \mathbf { 3 A } \text { (for this chapter) }\\\begin{array} { l l l l } \text { Amino acid } & \boldsymbol { \alpha } \text {-carboxyl group pK a } & \boldsymbol { \alpha } \text {-amino group pK a } & \text { R-group pK } \\\hline \text { Ala } & 2.3 & 9.7 & \\\text { Arg } & 2.2 & 9.0 & 12.5 \\\text { Asn or Gln } & 2.1 & 9.0 & 4.0 \\\text { Asp or Glu } & 2.2 & 9.8 & 8.3 \\\text { Cys } & 1.7 & 10.8 & 6.0 \\\text { His } & 1.8 & 9.2 & \\\text { Ser } & 2.2 & 9.2 & 10.1\end{array}\end{array}$$
-Refer to Exhibit 3A. The pI of the peptide ALA-GLN-ARG-SER-HIS would be:

• A) Strongly acid
• B) Weakly acid (4-6)
• C) About neutral (6-8)
• D) Weakly basic (8-10)
• E) Strongly basic

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Definitions:

Salvage Value

The anticipated remaining value of an asset once it has completed its functional lifespan, typically taken into account in computations of depreciation.

Natural Resources

Assets that come from the Earth and are used to produce goods and services, such as timber, oil, and minerals.

Units-of-Activity Method

The Units-of-Activity method is a depreciation approach based on the estimated usage, activity, or units produced over the asset's useful life, making depreciation expense directly proportional to its productivity.

Depreciated

The method of distributing the expense of a physical asset across its lifespan, indicating its diminishing value as time passes.