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BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

The classification of a sugar as a “reducing sugar” is dependent on the presence of a free carbonyl group that can be oxidized. Under physiological conditions, this oxidation results in the formation of

A. Sugar alcohols
B. Sugar acids like aldonic acid
✓
C. Amino sugars
D. Deoxy sugars

📝 Explanation

Oxidation of the aldehyde group (C-1) of an aldose yields an aldonic acid (e.g., gluconic acid from glucose). Oxidation of the primary alcohol group (C-6) yields a uronic acid. Reduction yields a sugar alcohol (alditol).

📖 Additional Information

  • Sugar alcohols
  • Sugar acids like aldonic acid
  • Amino sugars
  • Deoxy sugars

Oxidation of the aldehyde group (C-1) of an aldose yields an aldonic acid (e.g., gluconic acid from glucose). Oxidation of the primary alcohol group (C-6) yields a uronic acid. Reduction yields a sugar alcohol (alditol).

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