During the formation of a peptide bond between glycine and alanine, which molecules are involved in the dehydration synthesis reaction?

• A. Carboxyl group of glycine and hydroxyl group of alanine.
• B. Carboxyl group of glycine and amino group of alanine.
• C. Hydroxyl group of glycine and carboxyl group of alanine.
• D. Amino group of glycine and hydroxyl group of alanine.

Answer: (B)