From the given biomolecules, identify the one Which is not a polysaccharide .

Options

A. Cellulose
B. Glycogen
C. Chitin
D. Glycerol

Answer

To solve the question of identifying which biomolecule is not a polysaccharide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Polysaccharides**:
- Polysaccharides are carbohydrates that consist of long chains of monosaccharide units (sugars). Common examples include starch, cellulose, and glycogen.

2. **Identify the Given Biomolecules**:
- We need to analyze the biomolecules provided in the question. The examples mentioned in the video transcript are cellulose, glycogen, and a few others.

3. **Analyze Each Biomolecule**:
- **Cellulose**:
- Chemical formula: C6H10O5
- It is a long-chain polymer of glucose, thus it is a polysaccharide.
- **Glycogen**:
- Chemical formula: C6H10O5
- Similar to cellulose, it is also a long-chain polymer of glucose, hence it is a polysaccharide.
- **C8H13O5-N**:
- This compound contains nitrogen and is indicated as a polysaccharide due to its long-chain structure.
- **C3H8O3**:
- This is identified as a trihydroxy sugar alcohol, which does not fit the definition of a polysaccharide.

4. **Conclusion**:
- Among the biomolecules analyzed, C3H8O3 (glycerol) is not a polysaccharide. It is a sugar alcohol and does not consist of long chains of monosaccharide units.

### Final Answer:
The biomolecule that is not a polysaccharide is **glycerol (C3H8O3)**.

---