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BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

The dietary sugar that poses a significant risk for dental caries (cavities) due to its rapid fermentation by oral bacteria, particularly Streptococcus mutans, into lactic acid is

A. Lactose
B. Sucrose
✓
C. Trehalose
D. Cellulose

📝 Explanation

S. mutans produces glucosyltransferases that specifically use sucrose to synthesize sticky, water-insoluble glucan polymers (dental plaque). The sucrose is then fermented to lactic acid within this plaque, causing localized demineralization of tooth enamel.

📖 Additional Information

  • Lactose
  • Sucrose
  • Trehalose
  • Cellulose

S. mutans produces glucosyltransferases that specifically use sucrose to synthesize sticky, water-insoluble glucan polymers (dental plaque). The sucrose is then fermented to lactic acid within this plaque, causing localized demineralization of tooth enamel.

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