1. **Differentiating the three common polysaccharides:**
- **Cellulose:** Found in plant cell walls, it provides structural support to plants. Humans lack the enzymes to digest cellulose fully.
- **Starch:** It is the primary energy storage polysaccharide in plants. It can be found in sources like potatoes and grains. Starch is made up of amylose and amylopectin.
- **Glycogen:** The main storage form of glucose in animals, stored in the liver and muscles. It serves as a quick source of energy when needed.
2. **Explaining the difference between simple and complex carbohydrates:**
- **Simple carbohydrates:** These are sugars with a simple chemical structure and are quickly digested. Examples include glucose, fructose, and sucrose found in fruits, honey, and table sugar. They provide a rapid but short-lived energy boost.
- **Complex carbohydrates:** Made up of long chains of sugar molecules, they take longer to digest, providing sustained energy. Examples include starch found in grains, potatoes, and legumes. Fiber is also a complex carbohydrate that aids in digestion and helps maintain stable blood sugar levels.
