Lactose cannot be fermented, so it is rarely used in preparation of yeast bread products or alcoholic beverages that depend on fermentation.

Question

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Lactose is a disaccharide sugar composed of glucose and galactose. It is found in milk and dairy products. Yeast cannot ferment lactose because it lacks the enzyme lactase, which is necessary to break down lactose into glucose and galactose.

Lactose Cannot Be Fermented, So It Is Rarely Used in Preparation