Unbranched polymer of glucose is

Options

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

Answer

To answer the question "Unbranched polymer of glucose is," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Monomer**: The question specifies "unbranched polymer of glucose." Glucose is a monosaccharide and serves as the basic building block (monomer) for various polysaccharides.

2. **Understand Polysaccharides**: Polysaccharides are long chains of monosaccharides linked together. They can be branched or unbranched. Common examples include starch, glycogen, and cellulose.

3. **Differentiate Between Polysaccharides**:
- **Starch**: This is a polysaccharide made of glucose units but is branched in structure.
- **Glycogen**: Similar to starch, glycogen is also a branched polysaccharide made of glucose.
- **Cellulose**: This is another polysaccharide made of glucose units, but it is characterized by being unbranched.

4. **Conclude the Answer**: Since the question specifically asks for an unbranched polymer of glucose, the correct answer is cellulose. Cellulose is a linear chain of glucose molecules linked by β(1→4) glycosidic bonds, making it unbranched.

### Final Answer:
The unbranched polymer of glucose is **cellulose**.

---