Concept explainers
Interpretation: The following question can be explained by the classification of carbohydrates.
Concept introduction: Carbohydrates are simple derivatives of polyhydroxy
Given: Here we are given the Haworth structure of Isomaltose which we get from thebreakdown of starch and we are asked to find out the whether it is mono-, di-, or polysaccharide. We are also asked to find the monosaccharides and glycosidic link in isomaltose. Also, we need to find α or β-anomer of isomaltose, and whether it is a reducing sugar.
Answer to Problem 15.45UTC
Solution: (a) It is a disaccharide.
(b) The monosaccharides of Isomaltase are 2 molecules of α-glucose.
(c) The glycosidic link in Isomaltase is α-1,6-glycosidic bond.
(d) The given isomer is α-isomer.
Explanation of Solution
(a) In the given structure, there are 2 units of monosaccahrides. Thus, it is a disaccharide.
(b) If the molecule of Isomaltase is broken, then there is formation of 2 monosaccharide units of α-glucose molecules.
(c) The glycosidic bond in Isomaltase is formed between the C1 carbon of the 1st glucose molecule and the C6 carbon of the 2nd glucose. Thus the glycosidic link in Isomaltase is α-1, 6-glycosidic bond.
(d) When the hydroxyl group on C1 carbon atom is facing in downwards direction, then the isomer is called the α-isomer and when the hydroxyl group on C1 carbon atom is facing in upwards direction, then the isomer is called the β-isomer.
Here, the hydroxyl group on C1 carbon atom is facing in downwards direction, thus the given isomer is α-isomer.
Carbohydrates play important roles in the immune system, fertilization, blood clotting, overall development and preventing pathogenesis.
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Chapter 15 Solutions
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