Which one of the following compounds contains $\beta-\mathrm{C}_{1}-\mathrm{C}_{4}$ glycosidic linkage?

JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Biomolecules

Which one of the following compounds contains

β - C_{1} - C_{4}

glycosidic linkage?

(A)Maltose
(B)Lactose✓ Correct
(C)Amylose
(D)Sucrose

Answer: (B)

Solution

β

1, 4

glycosidic linkage joins C-1 of one sugar in the

β

configuration to C-4 of the next. Maltose and amylose are built from

α

1, 4

links and sucrose from an

α, β

1, 2

link, whereas lactose joins galactose to glucose through a

β

1, 4

bond. The compound with the

β

C_{1}

C_{4}

glycosidic linkage is lactose.

JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Single correct option

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