There are four problems to be answered:
1. What type of amino acid side chains would you expect to find folded on the interior of a globular protein? What kind of experimental evidence supports this claim?
2. Which amino acid lacks a stereoisomer and which has more than one asymmetric carbon?
3. What property of the DNA double helix allows us to say that the recognition site for a restriction endonuclease like BamHI (GGATCC) is a structural palindrom?
4. What general kind of quarternary structure do we expect to find for the restriction endonuclease PstI, which also recognizes a palindromic sructure?