Sucrose contains glucose and fructose linked by : (a) C₁-C₆ (b) C₁-C₄ (c) C₁-C₂ (d) C₁-C₁

Question 50 of 65

Q. Sucrose contains glucose and fructose linked by :

(a)

C_1-C_6

(b)

C_1-C_4

(c)

C_1-C_2

(d)

C_1-C_1

Puducherry TnboardTamil Nadu HSC (DGE) Board 2019MCQ· 1mImportance★★★★★

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The glycosidic bond in sucrose links glucose's $C_1$ (anomeric carbon) directly to fructose's $C_2$ (its anomeric carbon), which is why sucrose has no free reducing group.

Glucose exists in its pyranose ring form with the anomeric carbon at $C_1$ , and fructose exists in its furanose ring form with the anomeric carbon at $C_2$ . In sucrose, these two anomeric carbons are joined directly to each other through a shared oxygen — an $\alpha(1\rightarrow2)\beta$ glycosidic linkage — rather than one anomeric carbon linking to a non-anomeric $-OH$ of the other sugar. Because both anomeric carbons are tied up in this linkage, neither sugar unit can open to expose a free aldehyde/ketone g …

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Q.Sucrose contains glucose and fructose linked by :

Concept understanding — Disaccharides and the Glycosidic Linkage

Q.Sucrose contains glucose and fructose linked by :

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