Question

Read the given statement and select the option that correctly identifies X and Y. In a glycogen molecule, successive glucose units are joined together by X and branches are linked together by Y.

• A. X = 1, 6-α-glycosidic bonds, Y =1, 4-α-glycosidic bonds
• B. X = 1, 6-α-glycosidic bonds, Y = 1, 6-α-glycosidic bonds
• C. X = 1, 4-α-glycosidic bonds, Y =1, 4-α-glycosidic bonds
• D. X = 1, 4-α-glycosidic bonds, Y = 1, 6-α-glycosidic bonds

Answer 1

The correct option is D X = 1, 4-α-glycosidic bonds, Y = 1, 6-α-glycosidic bonds

Glycogen is a branched polymer of glucose. Glucose residues are linked linearly by α-1,4 glycosidic bonds (glycosidic bonds formed between C-1 of one glucose with the C-4 of the next). After every 10-14 units, a side chain branch occurs that attach at C-6 of a glucose unit by α-1, 6 glycosidic linkages.

So, the correct answer is "option B"