At a Physiological PH of 7

question 53

Multiple Choice

At a physiological pH of 7.4, amino acids exist as zwitterions. At a very low pH (in an acid solution) , both the amine group and the carboxylic acid group on an amino acid are protonated. Therefore, the following must be true: the pK_a of the ________ group is larger than the pK_a of the ________ group.

• A) protonated amine group; carboxylic acid group
• B) carboxylic acid group; protonated amine group
• C) amine group; carbonate group
• D) hydronium ion group; hydroxyl ion group
• E) carbonate group; amine group

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Definitions:

Dividend Growth Rate

The annualized percentage rate of growth of a company's dividend payments to shareholders.

T-Bill Rate

The yield or interest rate paid to investors of U.S. Treasury bills, a short-term government security.

SML

The Security Market Line, a representation in the Capital Asset Pricing Model (CAPM) that shows the expected return of a security or portfolio as a function of its systematic risk.

Expected Return

The anticipated amount of profit or loss an investment generates over a given period of time.