which one of the following is polysaccharide ?

Options

A. sucrose
B. Lactose
C. Glycogen
D. Glucose

Answer

To determine which of the following is a polysaccharide, we need to understand the definitions of monosaccharides, disaccharides, and polysaccharides.

### Step-by-Step Solution:

1. **Define Monosaccharides**:
- Monosaccharides are the simplest form of carbohydrates, consisting of single sugar units. They are polyhydroxy aldehydes or ketones.
- **Example**: Glucose is a common monosaccharide.

2. **Define Disaccharides**:
- Disaccharides are formed by the condensation of two monosaccharide units.
- **Examples**: Sucrose (table sugar) and lactose (milk sugar) are common disaccharides.

3. **Define Polysaccharides**:
- Polysaccharides are complex carbohydrates that consist of long chains of monosaccharide units linked together. They are sugar polymers containing more than two monosaccharide units.
- **Example**: Glycogen is a well-known polysaccharide that serves as a form of energy storage in animals.

4. **Identify the Polysaccharide**:
- From the definitions and examples provided, we can conclude that glycogen is a polysaccharide because it is made up of many glucose units linked together.

### Conclusion:
The correct answer to the question "which one of the following is a polysaccharide?" is **glycogen**.

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