Question:
Lactose is composed of:
Lactose is composed of:
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Lactose is a milk sugar, made of galactose and glucose linked by a β-1,4-glycosidic bond.
Updated On: Apr 7, 2026
- \( \alpha \)-D-glucose and \( \beta \)-D-galactose
- two units of \( \alpha \)-D-glucose
- \( \beta \)-D-galactose and \( \alpha \)-D-glucose
- \( \alpha \)-D-glucose and \( \beta \)-D-fructose
- two units of \( \beta \)-D-galactose
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The Correct Option is C
Solution and Explanation
Lactose is a disaccharide composed of one molecule of \( \beta \)-D-galactose and one molecule of \( \alpha \)-D-glucose. These two sugars are linked by a β-1,4-glycosidic bond, which is hydrolyzed by lactase in the human body.
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