Which of the following is an example of a typical homopolysaccharide?

Options

A. Lignin
B. Suberin
C. lnsulin
D. Starch

Answer

To determine which of the following is an example of a typical homopolysaccharide, we need to understand what a homopolysaccharide is.

### Step-by-Step Solution:

1. **Definition of Homopolysaccharide**:
A homopolysaccharide is a type of polysaccharide that consists of only one type of monosaccharide unit. This means that all the repeating units in the polymer are identical.

**Hint**: Remember that "homo" means "same" – so homopolysaccharides are made up of the same type of sugar.

2. **Analyzing the Options**:
- **Lignin**: This is not a homopolysaccharide; it is a complex organic polymer found in the cell walls of plants, primarily composed of phenolic compounds.
- **Suberine**: This is also not a homopolysaccharide; it is a biopolymer that is part of the protective layer in plant tissues, made up of various components.
- **Insulin**: This is a hormone made up of amino acids, not a polysaccharide, and therefore not a homopolysaccharide.
- **Starch**: This is a homopolysaccharide composed entirely of glucose units. It is a storage form of energy in plants.

**Hint**: Look for the option that consists of only one type of monosaccharide.

3. **Conclusion**:
Among the given options, starch is the only one that qualifies as a homopolysaccharide since it is made up entirely of glucose units.

**Final Answer**: Starch is the typical example of a homopolysaccharide.