What is the primary function of glycogenin in carbohydrate metabolism?

A To initiate glycogen synthesis ✓
B To regulate glycolysis
C To break down glycogen
D To synthesize starch

Explanation

Glycogenin is a protein that serves as a primer for glycogen synthesis, allowing glycogen synthase to add glucose units to the growing chain.

Source

Lehninger Principles of Biochemistry
Carbohydrate Metabolism Biochemistry Glycogen Metabolism Medium MEDICAL Confidence: high