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10 November, 10:30

The glycogen debranching enzyme is required for

the transfer of 3-glucose units from one branch to another.

the transfer of phosphate from one position to another.

cleaving alpha (1 to 6) sugar linkages

A and C

A, B and C

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Answers (1)
  1. 10 November, 10:50
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    A and C

    A. the transfer of 3-glucose units from one branch to another.

    C. cleaving alpha (1 to 6) sugar linkages

    Explanation:

    Glycogenolysis Enzymes

    Two enzymes participate in glycogenolysis:

    Glycogen phosphorylase, which catalyzes phosphorolysis or phosphorolytic cleavage of alpha 1-4 glycosidic bonds, which consists of the sequential separation of glucose residues from the non-reducing end, depending on the reaction:

    (glucose) n + Pi3 ← → (glucose) n-1 + glucose-1-P

    This reaction is very advantageous for the cell, compared to one of hydrolysis.

    Glycogen debranching enzyme.

    Glycogen phosphorylase cannot cleave O-glycosidic bonds in alpha (1-6). The glycogen de-branching enzyme has two activities: alpha (1-4) transferase glycosyl that transfers each unit of trisaccharide to the non-reducing end, and eliminates branching by alpha 1-6 glycosidic bonds:

    glucose-6-P + H2O2 → glucose + Pi
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