Statement I: Sucrose is a non-reducing sugar

Statement II: It has a glycosidic linkage

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

The correct answer is (1) Both Statement I and Statement II are correct, but Statement II is not the correct explanation of Statement I.

Statement I: Sucrose is a non-reducing sugar.
This statement is correct. Sucrose is a disaccharide composed of glucose and fructose molecules joined together by a glycosidic linkage. It is classified as a non-reducing sugar because it does not have a free aldehyde or ketone group that can undergo oxidation reactions. The anomeric carbons of both glucose and fructose are involved in the glycosidic linkage and are not available for oxidation.

Statement II: Sucrose has a glycosidic linkage.
This statement is also correct. Sucrose is formed by the glycosidic linkage between the anomeric carbon of glucose and the hydroxyl group of fructose. The glycosidic linkage is a covalent bond formed between the two sugar molecules, resulting in the formation of a disaccharide.

However, Statement II is not the correct explanation of Statement I. The non-reducing nature of sucrose is not solely due to its glycosidic linkage but rather because both glucose and fructose units involved in the linkage lack a free aldehyde or ketone group.