Question

Glycosidic linkage between C\(_1\) of \(\alpha\)-glucose and C\(_2\) of \(\beta\)-fructose is found in:

• A. maltose
• B. sucrose
• C. lactose
• D. amylose

Hint:

Sucrose is a non-reducing sugar as both anomeric carbons of glucose and fructose are involved in glycosidic linkage.

Answer 1

The Correct Option is B

Step 1: Glycosidic Linkage Basics
Glycosidic bonds are covalent linkages formed between monosaccharides via dehydration synthesis.
The specific glycosidic bond dictates the disaccharide's digestibility and biological role.
Step 2: Linkage Comparisons
Maltose: Two glucose units joined by a C\(_1\)-C\(_4\) \(\alpha\)-glycosidic bond.
Sucrose: A glycosidic bond connects C\(_1\) of \(\alpha\)-glucose to C\(_2\) of \(\beta\)-fructose.
Lactose: Composed of galactose and glucose, linked by a C\(_1\)-C\(_4\) glycosidic bond.
Amylose: Glucose monomers linked by C\(_1\)-C\(_4\) \(\alpha\)-glycosidic bonds.
Conclusion: Sucrose's linkage (\(\alpha\)-glucose and \(\beta\)-fructose at C\(_1\)-C\(_2\)) makes (B) the correct answer.