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Lactose is composed of

1. Glucose + Glucose
2. Glucose + Fructose
3. Fructose + Galactose
4. Glucose + Galactose

Correct answer: Glucose + Galactose

Solution

Lactose is the milk sugar, and it is a disaccharide made from glucose and galactose. The enzyme lactase breaks it into these two monosaccharides during digestion.

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