2. Draw the structure and give the systematic name of the given disaccharides. (a) Lactose which is also known as milk sugar: β-D-Gal(1--> 4)β-D-Glc, where Gal is galactose and Glc is glucose.  (b) Sucrose which is also known as table sugar: β -D-Glc (1-->2) β-D-Fru where Glc is glucose and Fru is fructose.

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