Question

The type of Polysaccharide present in a cotton fibre

• A. Glycogen
• B. Starch
• C. Insulin
• D. Cellulose

Answer 1

The Correct Option is D

The correct answer is:

Option 4: Cellulose

Explanation:

Cotton fibers are primarily made of cellulose, a complex polysaccharide. Cellulose is a structural carbohydrate found in the cell walls of plants and provides rigidity and strength to plant structures like cotton fibers.

The other options are incorrect because:

Glycogen (Option 1) is a storage polysaccharide found in animals, primarily in the liver and muscles.

Starch (Option 2) is a storage polysaccharide found in plants, but it is not the main component of cotton fibers.

Insulin (Option 3) is a protein hormone, not a polysaccharide.

Thus, cellulose is the polysaccharide present in cotton fibers.

Answer 2

Let's consider the composition of cotton fiber and the properties of each polysaccharide option:

• **Glycogen:** This is the storage form of glucose in animals, primarily found in the liver and muscles. It's not a structural component of plant fibers.
• **Starch:** This is the storage form of glucose in plants, found in structures like roots, stems, and seeds. While plants use starch for energy storage, it's not the primary structural component of plant fibers like cotton.
• **Inulin:** Inulin is a type of soluble fiber found in some plants. It is a storage polysaccharide, particularly in the roots of some plants like dandelions. It is not the main component of cotton fiber.
• **Cellulose:** This is a structural polysaccharide that forms the main component of plant cell walls. It provides rigidity and strength to plant tissues. Cotton fibers are almost pure cellulose.

Therefore, the type of polysaccharide present in cotton fiber is Cellulose.