Which of the following is a polysaccharide?
(a) Insulin, the chief blood sugar regulator.
(b) Cellulose, the primary component of plant cell walls.
(c) Fructose, one of the most important blood sugars.
(d) Glucose, the chief cellular energy source.
(e) All of the above are polysaccharides.
The correct answer is (b).
Cellulose, the primary component of plant cell walls, is a polysaccharide.
Types of Polysaccharides
Polysaccharides are ubiquitous in nature. They are also known as glycans. Polysaccharides can be classified into two types based on their functions: structural polysaccharides and storage polysaccharides.