What is meant by (i) peptide linkage (ii) biocatalysts?

(i) Peptide linkage is the amide bond that helps to connect amino acids to form proteins. A peptide bond (amide bond) is a covalent chemical bond linking two consecutive amino acid monomers along a peptide or protein chain. (ii) Biocatalysts are enzymes that catalyze the biochemical reactions in the bodies of living organisms, e.g., amylase.