28. the monomers of proteins are called ______________ of which there are ________ different kinds. they are…

28. the monomers of proteins are called ______________ of which there are ________ different kinds. they are held together by ____________ bonds.
Answer
Brief Explanations:
Proteins are polymers made up of amino - acid monomers. There are 20 different common amino acids. Amino acids are linked together by peptide bonds to form proteins.
Answer:
Amino acids; 20; Peptide