Glycogen is a branched chain polymer of `alpha-D` glucose units in which chain is formed by `Cl-C4` glycosidic linkage where as branching occurs by the formation of `C1-C6` glycosidic linkage. Structure of glycogen is similar to .... .

Options

A. amylose
B. amylopectin
C. cellulose
D. glucose

Explanation

To determine the structure that glycogen is similar to, we need to analyze the characteristics of glycogen and compare them with the given options.

### Step-by-Step Solution:

1. **Understanding Glycogen Structure**:
Glycogen is a branched polymer made up of α-D-glucose units. The chains are formed by α(1→4) glycosidic linkages, while the branches are formed by α(1→6) glycosidic linkages.

2. **Comparing with Options**:
We have four options to consider: amylose, amylopectin, cellulose, and glucose.

3. **Analyzing Amylose**:
Amylose is a linear polymer of glucose units linked by α(1→4) glycosidic bonds. It does not have branching, which makes it structurally different from glycogen.

4. **Analyzing Amylopectin**:
Amylopectin is a branched polymer of glucose, similar to glycogen. It contains both α(1→4) linkages for the main chain and α(1→6) linkages for the branches, making its structure very similar to that of glycogen.

5. **Analyzing Cellulose**:
Cellulose is a polymer of β-D-glucose units linked by β(1→4) glycosidic bonds. This structure is quite different from glycogen, which uses α-glucose and has different linkages.

6. **Analyzing Glucose**:
Glucose is a monosaccharide and does not have a polymeric structure like glycogen.

7. **Conclusion**:
Since glycogen and amylopectin both have similar branching structures and types of glycosidic linkages, the correct answer is that glycogen is structurally similar to amylopectin.

### Final Answer:
The structure of glycogen is similar to **amylopectin**.