1. Write Haworth projection formulas for such substances: 4.1 B-D-glucofuranose; 4.2 a-D-fructopyranose; 4.3 saccharose. 1.4 In the formulas a and b show the hemi-acetal hydroxyl. 2. Write: why lactose is a reducing disaccharide. 3. Write the equations of reactions: 3.1 glucose +Cu(ОН),(heat) —; 3.2 glucose +HNO,→; 3.3 a-D-glucopyranose +CH,I→; 3.4 a-D-glucopyranose +(CH;CO);O→; 3.5 lactose hydrolysis; 3.6 glucuronic acid formation from glucose. 4. Describe the signs of reactions: 4.1 iodine starch reaction; 4.2 Selivanov's reactions for the fructose; 4.3 glucose reactions with Cu(OH); with heating.

Q: Draw Hayworth projection for the disaccharide gentobiose given that the glycoside linkage is (16)

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