Adisaccharide is formed by the chemical bonding of two monosaccharides. two polysaccharides. one monosaccharide and one polysaccharide. two oligosaccharides.

Option (a) is the correct answer.

Explanation:

When two monosaccharide units chemically combine together through a glycosidic linkage then it leads to the formation of a double sugar which is known as a disaccharide.

For example, sucrose, lactose etc are disaccharides.

Monosaccharides are the basic building blocks of carbohydrates and they are also known as simple sugars. These are also water soluble in nature.

For example, glucose is a monosaccharide.

Polysaccharides are defined as the substances which contain number of monomer units. For example, starch, cellulose, glycogen etc are polysaccharides.

Thus, we can conclude that a disaccharide is formed by the chemical bonding of two monosaccharides.

20 drops hope this

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-