In a protein/polypeptide amino acids are linked by
All the above
The correct option is B Peptide bonds Proteins are building blocks of the body. The proteins are made up of amino acids. The amino acids are linked together by peptide bonds to form a protein. The peptide bond is formed by the linkage of the carboxyl group of one amino acids with the amino group of the amino acids. The primary structure of proteins is formed by the linkage of amino acids by the peptide bond. It is formed by the condensation reaction.