UPSC 2016 CDS I GK Paper

Among the given hormones, Cortisone contains peptide chain. Cortisone, also known as 17α, 21- dihydroxypregn-4-ene-3,11,20- trione, is a pregnane (21-carbon) steroid hormone. It is one of the main hormones released by the adrenal gland in response to stress. A polypeptide is a single linear chain of many amino acids, held together by amide bonds. A protein consists of one or more polypeptides (consisting of more than about 50 amino acids).