(a) determine which specificity pocket is a part of each enzyme. move each specificity pocket, below, to the proper bin. note: if you answer part (a) incorrectly, a single red x will appear indicating that one or more of the answers are sorted incorrectly.

Chymotrypsin, trypsin and elastase are digestive enzymes called serine proteases.
Chymotrypsin have peptide bonds with aromatic side chains (phenylalanine, tyrosine). The specificity pocket is deep and has hydrophobic side chains. 
Trypsin's specificity pocket contains a negatively charged amino acid residue.
Elastase specificity pocket has bulky side chains that block larger amino acid side chains.

A.