Step 1: Concept Overview:
Sucrose, a non-reducing disaccharide, consists of glucose and fructose linked by a glycosidic bond. We aim to define this bond precisely.
Step 2: Detailed Bond Description:
Sucrose is formed from \(\alpha\)-D-glucose and \(\beta\)-D-fructose.
The glycosidic bond connects the C1 anomeric carbon of glucose to the C2 anomeric carbon of fructose.
This is specifically an \(\alpha\)-1 to \(\beta\)-2 linkage.
The IUPAC name for sucrose is \(\alpha\)-D-glucopyranosyl-(1\(\rightarrow\)2)-\(\beta\)-D-fructofuranoside.
Evaluating the answer choices:
(A) describes the glycosidic bond present in lactose (Galactose + Glucose).
(B) and (C) depict incorrect carbon linkages.
(D) Fru(2\(\beta \leftrightarrow \alpha\)1)Glc accurately represents the \(\alpha\)-1, \(\beta\)-2 bond between glucose and fructose. The (\(\leftrightarrow\)) signifies a bond between anomeric carbons, explaining sucrose's non-reducing property.
Step 3: Conclusion:
The glycosidic bond in sucrose is an \(\alpha\)-1, \(\beta\)-2 linkage, as shown in option (D).