Amylose and amylopectin chains occur in

Options

A. glycogen
B. starch
C. cellulose
D. chitin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where amylose and amylopectin chains occur. Both of these are components of a specific type of carbohydrate.

2. **Identifying Carbohydrates**: Carbohydrates can be classified into simple carbohydrates (sugars) and complex carbohydrates (polysaccharides). Amylose and amylopectin are types of polysaccharides.

3. **Defining Polysaccharides**: Polysaccharides are large molecules made up of many sugar units. They serve various functions, including energy storage and structural roles.

4. **Identifying Food Storage Polysaccharides**: Among polysaccharides, there are food storage polysaccharides. The main examples are starch (in plants) and glycogen (in animals).

5. **Understanding Starch**: Starch is a complex carbohydrate that consists of two components: amylose and amylopectin. Amylose is a linear chain of glucose units, while amylopectin is a branched chain of glucose units.

6. **Composition of Amylose and Amylopectin**:
- Amylose typically contains 200 to 1,000 glucose units linked together.
- Amylopectin contains a much larger number of glucose units, ranging from 2,000 to 200,000, and is linked by alpha 1,4 glycosidic bonds.

7. **Conclusion**: Since amylose and amylopectin are both found in starch, and starch is the storage form of carbohydrates in plants, the correct answer to the question is that amylose and amylopectin chains occur in starch.

**Final Answer**: Amylose and amylopectin chains occur in starch.

---