What is formed when two amino acids bond together?

When two amino acids bond together, they form a dipeptide through a process known as dehydration synthesis or condensation reaction. During this reaction, the carboxyl group of one amino acid reacts with the amino group of another, releasing a molecule of water and resulting in the formation of a covalent bond known as a peptide bond. The dipeptide molecule consists of exactly two amino acids linked together in this way, which can serve as building blocks for larger protein structures.

It's important to note that as more amino acids are added through further peptide bonds, larger structures known as tripeptides (which contain three amino acids) and polypeptides (which are longer chains of amino acids) are formed. Ultimately, when a polypeptide folds into a functional three-dimensional shape, it can be referred to as a protein. However, since the question specifically pertains to the bonding of just two amino acids, the correct answer is indeed dipeptide.