Out of the following which is not polysaccharide ?

Options

A. sucrose
B. starch
C. glycogen
D. cellulose

Answer

To determine which of the given options is not a polysaccharide, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- A) Sucrose
- B) Starch
- C) Glycogen
- D) Cellulose

2. **Analyze Sucrose**:
- Sucrose is known as a disaccharide. It is composed of two monosaccharides: glucose and fructose. Since it consists of only two sugar units, it does not qualify as a polysaccharide.

3. **Analyze Starch**:
- Starch is a polysaccharide and serves as a storage form of energy in plants. It is made up of numerous glucose units linked together. Therefore, this option is a polysaccharide.

4. **Analyze Glycogen**:
- Glycogen is also a polysaccharide. It acts as a storage form of energy in animals and is composed of multiple glucose units. Thus, this option is a polysaccharide as well.

5. **Analyze Cellulose**:
- Cellulose is another polysaccharide. It is a structural component of plant cell walls and is made up of glucose units linked together by beta-glycosidic bonds. Hence, this option is also a polysaccharide.

6. **Conclusion**:
- After analyzing all the options, we find that the only option that is not a polysaccharide is **A) Sucrose**.

### Final Answer:
**The option that is not a polysaccharide is A) Sucrose.**

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