In order to build the dipeptide, water was removed and smaller molecules were joined o make a larger molecule. what is the name of this chemical process?

dehydration synthesis

Explanation:

A dipetide is obtained when two amino acid molecules are joined  together through dehydration synthesis, which result in the formation of peptide bonds. Through this process water is removed {dehydration) to allow for the combining(synthesis) of the molecules .The amino acids are the smaller molecules that are joined to  form the larger molecule which is the dipeptide.