Final answer:
Lactose, the sugar in milk, consists of one molecule of ß-D-galactose and one molecule of D-glucose and is commonly referred to as milk sugar.
Explanation:
Lactose is the sugar found in milk, composed of one molecule of ß-D-galactose and one molecule of D-glucose joined by a B-1,4-glyco bond. It is known as milk sugar and is a disaccharide compound present in significant amounts in dairy products like milk, yogurt, and cheese.
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