The class of biological molecules that contains peptide bonds between the individual monomers is proteins.

Here's why:

* Monomers of proteins are amino acids.

* Peptide bonds are formed between the amino group (-NH2) of one amino acid and the carboxyl group (-COOH) of another amino acid. This bond links the amino acids together to form a chain, known as a polypeptide.

* Proteins are made up of one or more polypeptide chains.

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