Question

The correct statement about the following disaccharide is

• A. Ring (i) is pyranone with $\alpha$ - glycosidic link
• B. Ring (i) is furanose with $\alpha$ - glycosidic link
• C. Ring (ii) is furanose with $\alpha$ -glycosidic link
• D. Ring (ii) is pyranose with $\beta -$glycosidic link

Answer 1

Answer: (A)

Ring (i) is pyranone with $\alpha$ - glycosidic link

Answer 2

The disaccharide is sucrose, with ring (i) having 6-members and hence is a pyranose and ring (ii) has 5- members and hence is a furanose. C -1 of ring (i) has an $\alpha -$glycosidic linkage.