What is the primary function of glycogenin in glycogen synthesis?

A To break down glycogen into glucose
B To initiate the synthesis of glycogen chains ✓
C To regulate the activity of glycogen synthase
D To catalyze the conversion of glucose to glycogen

Explanation

Glycogenin is an enzyme that initiates the synthesis of glycogen chains by adding glucose molecules to a protein backbone.

Source

Biochemistry textbooks
Carbohydrate Metabolism Biochemistry Glycogen Synthesis Medium MEDICAL Confidence: high