Question

What is a disaccharide? What monosaccharide units make up the disaccharide sucrose? What is the bond called that forms between the monosaccharide units?What is a disaccharide? What monosaccharide units make up the disaccharide sucrose? What is the bond called that forms between the monosaccharide units?

Short answer

Disaccharides are sugars which are composed of two monosaccharide units. Disaccharide sucrose is made of glucose and fructose. Two monosaccharides can form disaccharide by forming glycosidic bonds.

Step-by-step solution

Definition of disaccharide

A disaccharide is a carbo -hydrate nit formed from two monosaccharides. Sucrose is one type of disaccharide which is a combination of monosaccharide glucose and fructose which are connected via glycosidic bond.

Step 2: To find the bond between monosaccharide units

Two monosaccharides can form a disaccharide by forming glycosidic bonds. Glycosidic bond is a covalent bond. It occurs via condensation reaction and joins the hemiacetal group of a saccharide molecule and the hydroxyl group of some organic compound.

Sucrose = glucose + fructose

Therefore, sucrose is a disaccharide made from glucose and fructose.