Write a note on Disaccharide compounds.

(N/A) Disaccharides are carbohydrates that yield two molecules of the same or different monosaccharides upon hydrolysis with dilute acids or enzymes.
They are formed by the condensation of two monosaccharide units,which are linked together by an oxide linkage known as a glycosidic linkage.
Common examples include sucrose,maltose,and lactose.
For instance,sucrose on hydrolysis gives one molecule of $\alpha-D$-glucose and one molecule of $\beta-D$-fructose. These two monosaccharides are held together by a glycosidic linkage between $C1$ of $\alpha-D$-glucose and $C2$ of $\beta-D$-fructose.