Answer;
-Proteins
Step-by-step explanation;
-Proteins are biomolecules that are made of amino acids monomers that are joined by peptide bonds. They may serve as antibodies.
-Antibodies are proteins that are synthesized by animals in response to the presence of a foreign substances in our body, known as antigens.
-Additionally, proteins may have other different roles which includes; structural components, sources of energy (during starvation) and also as biological catalysts among others.