20.Chemical nature of hormones secreted by a and b cells of pancreas is A. Glycoprotein B. Steroid C. Polypeptide D. Glycolipid
Option C Beta cells of islets of Langerhans make and release insulin and alpha cells secrete glucagon. Glucagon is a 29-amino acid polypeptide. Insulin is composed of two polypeptide chains linked by disulfide bonds- chain A has 21 amino acids and chain B has 30 amino acids.
