Biomolecules and Chemistry in Everyday Life - Result Question 22
####23. The correct statement about the following disaccharide is
(a)
(b)
(2010)
(a) Ring (a) is pyranose with $\alpha$-glycosidic link
(b) Ring (a) is furanose with $\alpha$-glycosidic link
(c) Ring (b) is furanose with $\alpha$-glycosidic link
(d) Ring (b) is pyranose with $\beta$-glycosidic link
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Answer:
Correct Answer: 23. (d)
Solution:
- The six-membered cyclic ether is known as pyranose while the five membered cyclic ether is known as furanose. Hence, ring (a) is a pyranose and it has ether linkage at $\alpha$-position that is known as $\alpha$-glycosidic linkage in carbohydrate chemistry.
