The Following Question(s) Are Based on the 15 Molecules Illustrated

Multiple Choice

The following question(s) are based on the 15 molecules illustrated in the accompanying figure. Each molecule may be used once, more than once, or not at all.
-Which of the following pairs of molecules could be joined together by a peptide bond in a dehydration reaction?

A) 2 and 3
B) 3 and 7
C) 7 and 8
D) 8 and 9
E) 12 and 13