How can the amino acids tyrosine and lysine form a dipeptide?
A) Water is removed as the side chains of tyrosine and lysine join together.
B) Water is removed as the carboxyl group of tyrosine joins the amino group of lysine.
C) Water is added as the carboxyl group of tyrosine joins the amino base group of lysine.
D) Water is added as the side chains of tyrosine and lysine join together.
Answer: B