Pick up the heteropolysaccharide?

Options

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

Answer

To solve the question of identifying the heteropolysaccharide from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Polysaccharides**:
- Polysaccharides are carbohydrates that consist of long chains of sugar units. They can be classified into two types:
- **Homopolysaccharides**: Composed of the same type of monosaccharide units.
- **Heteropolysaccharides**: Composed of different types of monosaccharide units.

2. **Analyze the Given Options**:
- The options provided are:
- A) Starch
- B) Glycogen
- C) Cellulose
- D) Pectin

3. **Examine Each Option**:
- **Glycogen**:
- Structure: Made entirely of glucose monomers.
- Classification: Homopolysaccharide.
- **Starch**:
- Structure: Also made entirely of glucose monomers.
- Classification: Homopolysaccharide.
- **Cellulose**:
- Structure: Composed solely of glucose monomers.
- Classification: Homopolysaccharide.
- **Pectin**:
- Structure: Composed of different types of galacturonic acid units.
- Classification: Heteropolysaccharide (since it consists of different variants of galacturonic acid).

4. **Identify the Heteropolysaccharide**:
- From the analysis, we see that pectin is the only polysaccharide that is made up of different types of sugar units, making it a heteropolysaccharide.

5. **Conclusion**:
- The correct answer to the question "Pick up the heteropolysaccharide" is **D) Pectin**.