When two amino acids are linked together.
yes
Hydrolysis (breaking) of a dipeptide results in two amino acids.
two amino acids joined by a single peptide bond (amino acids make up proteins)
Forms between two Adjacent Amino Acids Peptides (from the Greek πεπτίδια, "small digestibles") are short polymers formed from the linking, in a defined order, of α-amino acids. The link...