The polypeptide chain is formed from amino acids that are linked together by peptide bonds. Many amino acids come together to form a polypeptide chain. The amino acid is the building block of the polypeptide chain as polypeptide chains form the building block of proteins. Polypeptides are formed during the process of translation in the cell cycle. This is the process of building the polypeptide chain. Based on the codons present of mRNA (Messenger Ribonucleic Acid), amino acids are added to the growing chain. Amino acids are carried by different tRNA (Transfer Ribonucleic Acids), which are specific to each amino acid.
Many enzymes, channels, and structures needed for the normal functioning of our body are made from polypeptide chains. Di peptide refers to a chain with two amino acids. Tri peptide chain has three amino acids. The tetrapeptide chain has four amino acids, and oligopeptide means less than 10. The term Poly peptide refers to a chain that has more than ten amino acids. I hope you find this information helpful.