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BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

The transformation of α-D-glucose and β-D-glucose in an aqueous solution to an equilibrium mixture is a process termed

A. Epimerization
B. Mutarotation
✓
C. Racemization
D. Tautomerization

📝 Explanation

When a pure anomer (α or β) is dissolved in water, the specific rotation of the solution changes over time until a constant value is reached. This is mutarotation, resulting from the ring opening and reclosing, establishing an equilibrium mixture of α (36%), β (64%), and the open-chain form (<0.1%).

📖 Additional Information

  • Epimerization
  • Mutarotation
  • Racemization
  • Tautomerization

When a pure anomer (α or β) is dissolved in water, the specific rotation of the solution changes over time until a constant value is reached. This is mutarotation, resulting from the ring opening and reclosing, establishing an equilibrium mixture of α (36%), β (64%), and the open-chain form (<0.1%).

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