Complex molecules made from amino acids are called

Proteins

Explanation:

Building blocks of proteins are amino acids that are bonded by peptide bonds. The bonded amino acids form a long chain, which is essentially a protein.  Proteins are essential to the body as they control the structure, function, and regulation of the different cells, tissues and organs that make up different organisms. The arrangement of the amino acids are specific to a certain protein.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )