JEE Main · 2019 · 09 Apr 2019 · Shift 1 · Biomolecules

In sucrose the link joins the anomeric ${\text{C}}_1$ of $\alpha$-glucose to the anomeric ${\text{C}}_2$ of $\beta$-fructose, an $\alpha ,\beta$-$1,2$ glycosidic bond. Because both anomeric carbons are tied up, no free aldehyde or keto group is left, so sucrose is non-reducing, and on hydrolysis it gives glucose and fructose, the mixture known as invert sugar. The claim that the linkage is between ${\text{C}}_1$ of glucose and ${\text{C}}_1$ of fructose is the untrue one, since the fructose carbon involved is ${\text{C}}_2$, not ${\text{C}}_1$.