Chemistry - Biomolecules Question with Solution | TestHub

In the given structure, ring one $\left(\mathrm{I}\right)$ has one $\mathrm{O}$-atom and is a $6$ membered ring, thus is called pyranose ring, whereas ring $\left(\mathrm{II}\right)$ has one $\mathrm{O}$-atom and is a five membered ring, thus is called furanose.

The disaccharide is linked by a glycosidic bond between $\mathrm{C}-1$ of glucose (in the $\mathrm{\alpha }$ -position, $\mathrm{\alpha }$ linkage) and $\mathrm{C}-2$ of fructose (in the $\mathrm{\beta }$-position, $\mathrm{\beta }$-linkage).