Which of the following is a branched polymer, having branched chain polysaccharide units ?

Options

A. Starch
B. Bakelite
C. High density polyethylene
D. Nylon

Answer

To solve the question regarding which of the following is a branched polymer with branched chain polysaccharide units, we will analyze the options given: starch, bakelite, high-density polyethylene, and nylon.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Starch**: A polysaccharide made up of amylose and amylopectin.
- **Bakelite**: A synthetic polymer, a type of thermosetting plastic.
- **High-Density Polyethylene (HDPE)**: A linear polymer made from ethylene.
- **Nylon**: A synthetic polymer, typically a linear polyamide.

2. **Analyzing Starch**:
- Starch consists of two components:
- **Amylose**: This is a linear polymer made up of α-1,4 glycosidic linkages.
- **Amylopectin**: This is a branched polymer that contains both α-1,4 and α-1,6 glycosidic linkages.
- The branched structure of amylopectin is what makes starch a branched polymer.

3. **Examining Other Options**:
- **Bakelite**: It is a cross-linked polymer but not a polysaccharide.
- **High-Density Polyethylene**: It is a linear polymer without branching.
- **Nylon**: It is also a linear polymer and does not have branched chain polysaccharide units.

4. **Conclusion**:
- Among the given options, starch is the only one that has branched chain polysaccharide units due to the presence of amylopectin.

Thus, the correct answer is **starch**.