Question

Which of the following is NOT a disaccharide?
a. Maltose
b. Sucrose
c. Glycogen
d. Lactose

Answer 1

Glycogen is not a disaccharide

Answer 2

Option C) Glycogen

It is not a disaccharide or glycogen. A homopolysaccharide of -D-Glucose units is called glycogen.

Homopolysaccharides:

• Polysaccharides known as homopolysaccharides are made up of just one kind of sugar monomer.
• Examples of homopolysaccharides include dextran, starch, glycogen, and cellulose.

Some of these are explained below:

1) Starch

• Starch is a homopolysaccharide composed of glucose monomer units connected by glycosidic linkage.
• Starch is the most important nutrient reservoir and storage carbohydrate in plant cells.
• Within the plant cells, the starch molecules are grouped together or located in granules.
• Starch makes up more than half of what humans eat in terms of carbohydrates.

2) Glycogen

• Glycogen is the main polysaccharide molecule stored by animal cells.
• The only structural difference between glycogen and amylopectin is the degree of branching.

3) Cellulose

• Cellulose is one of the most prevalent biomaterials in nature.
• The majority of the time, plants create it, however, bacteria can also.
• A stiff, fibrous, water-insoluble carbohydrate, cellulose is mostly present in plant cell walls.

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