Each of the Following Statements About the Side Chains of Amino

Multiple Choice

Each of the following statements about the side chains of amino acid residues is true EXCEPT which one?

A) Isoleucine, valine and tryptophan tend to be in the interior of protein molecules.
B) Catalytically functional groups include aspartate, histidine and cysteine.
C) Tyrosine, phenylalanine and threonine participate in hydrogen bond formation.
D) Lysine, arginine and glutamate form ionic bonds with substrates and other protein components.
E) Lysine, cysteine and tyrosine have pKa's higher than 7.0.