Answer:
The correct answer is option C. "a double bond forms between carbon and nitrogen".
Step-by-step explanation:
A dipeptide are formed by the binding of two amino acids. The chemical bond that binds the two amino acids is called peptide bond, and when enough amino acids are joined together a protein is formed. It is not true that a double bond forms between carbon and nitrogen during the formation of a dipeptide, carbon and nitrogen are bond by a single covalent bond.