Glycosidic linkage between $\ce{C1}$ of $\alpha$-glucose and $\ce{C2}$ of $\beta$-fructose is found in

JEE Main · 2022 · 25 Jul 2022 · Shift 2 · Biomolecules

Glycosidic linkage between

C X_{1}

α

-glucose and

C X_{2}

β

-fructose is found in

(A)maltose
(B)sucrose✓ Correct
(C)lactose
(D)amylose

Answer: (B)

Solution

Sucrose is a disaccharide formed by a glycosidic linkage between

C X_{1}

α

-glucose and

C X_{2}

β

-fructose. This is an

α (1 \to 2)

glycosidic bond. Maltose has

α (1 \to 4)

linkage between two glucose units, lactose has

β (1 \to 4)

linkage between galactose and glucose, and amylose is a polymer of glucose. Answer: (B) sucrose.

JEE Main · 2022 · 25 Jul 2022 · Shift 2 · Single correct option

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