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Question

The number of 'ends' in a glycogen molecule would be

(a) Equal to the number of branches plus one

(b) Equal to the number of branch points

(c) One

(d) Two, one on the left side and another on the right side

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Solution

(a) Glycogen is the multibranched polysaccharide of glucose units popularyly known as animal starch. as it is chemically simillar to starch. It has 30.000 glucose residues and a molecular weight of about 4.8 million. Glucose residues in glycogen are arranged in a highly branched bush like chains.

There are two main linkage patterns, observed in glycogen, i.e., α 1-4 linkage in the straight part and α 1-6 linkage in the area of branching. The distance between two branchign points is 10-14 glucose residues. Glycogen has as many non-reducing ends as branches plus one.


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