This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Which of the following is present in cornea? \nSelect and explain. \nA. Hyaluronic acid, B. Chondroitin sulphate, C. Dermatan sulphate, D. Heparin sulphate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chondroitin Sulphate - It is present in ground substance of connective tissues widely distributed in cailage, bone, tendons, cornea and skin. It is composed of repeating units of glucuronic acid - beta-1,3-N-acetyl galactosamine sulphate - beta-1, 4 and so on. POLYSACCHARIDES -These are polymerized products of many monosaccharide units. They may be 1. Homoglycans- are composed of single kind of monosaccharides, e.g. starch, glycogen and cellulose. 2. Heteroglycans are composed of two or more different monosaccharides, e.g. hyaluronic acid, chondroitin sulphate. REF:DM VASUDEVAN TEXTBOOK OF BIOCHEMISTRY,SIXTH EDITION,PG.NO.,96,98.', 'role': 'assistant'}]