Feedback: Multiple Choice Quiz 4

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  1. Table 3.2 in Campbell lists all of the values. Ignore the detailed differences, but remember the values shown here.

  2. Only the Trp & Tyr combination is aromatic, a necessary feature for UV absorption.

  3. The amino acids are grouped by similar side chain polarities. The "Asp, Ile, and Pro" group has wildly different polarities.

  4. Purely a definition question. See p. 67 in Campbell.

  5. All of the amino acids without an ionizable side chain will be zwitterions at neutral pH; alanine is one of them. Can you name three or four others?