which one is a fibrous polysaccharide ?

Options

A. Starch
B. Glycogen
C. Cellulose
D. Mucilage

Answer

To determine which one is a fibrous polysaccharide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Polysaccharides**:
- Polysaccharides are carbohydrates that consist of long chains of monosaccharide units (sugars) linked together by glycosidic bonds. The term "poly" means many, and "saccharide" refers to sugar.

2. **Identify Types of Polysaccharides**:
- There are two main types of polysaccharides:
- **Storage Polysaccharides**: Such as starch and glycogen, which serve as energy reserves.
- **Structural Polysaccharides**: Such as cellulose, which provide structural support.

3. **Define Fibrous Polysaccharides**:
- Fibrous polysaccharides are those that provide structural integrity and strength. They are typically insoluble in water and form fibers.

4. **Analyze Given Options**:
- The options provided are starch, glycogen, and cellulose.
- **Starch**: A storage polysaccharide found in plants, composed of amylose and amylopectin.
- **Glycogen**: A storage polysaccharide found in animals, similar to starch but more branched.
- **Cellulose**: A structural polysaccharide found in the cell walls of plants, composed of linear chains of glucose units.

5. **Identify the Correct Answer**:
- Among the options, **cellulose** is the only fibrous polysaccharide. It provides rigidity and strength to plant cell walls and is made up of glucose monomers linked by β-1,4-glycosidic bonds.

### Conclusion:
The correct answer is **cellulose**, which is a fibrous polysaccharide.

---