Vollhardt,Chapter26

Vollhardt,Chapter26 - Chapter 26 1 What do 19 of the 20...

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Chapter 26: 1. What do 19 of the 20 amino acids have in common? a. A ring structure. b. An amine terminus. c. A carboxylic acid terminus. d. A chiral center between the amine and the carboxylic acid functional groups. Answer: D 2. How are amino acids synthesized? a. The Strecker synthesis. b. The Gabriel synthesis. c. The Hell-Volhard-Zelinsky bromination and an amination. d. All three of the above can produce amino acids. Answer: D 3. What is an established means of producing optically pure amino acids? a. The Gabriel synthesis produces optically pure amino acids. b. Stereoselective nucleophilic addition to glycine. c. Protection of the amino terminus, followed by treatment with an optically active amine, then fractional crystallization of the diastereomers. d. Separation of the mixed amino acids with an achiral chromatographic column. Answer: C 4. How is the secondary structure of a protein best described? a.
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Vollhardt,Chapter26 - Chapter 26 1 What do 19 of the 20...

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