Which is a reducing sugar with an α-glycosidic linkage?

Question

Quizplus · Accepted Answer

Maltose is a reducing sugar because it has a free anomeric carbon with an α-glycosidic linkage, which can open up and participate in a reducing sugar reaction. Sucrose has a glycosidic linkage between glucose and fructose, but it is not a reducing sugar because both anomeric carbons are involved in the glycosidic linkage. Lactose has a β-glycosidic linkage, which cannot open up to participate in a reducing sugar reaction. Cellobiose has an β-glycosidic linkage and cannot participate in a reducing sugar reaction.

Which Is a Reducing Sugar with an α-Glycosidic Linkage