Exploring Enzymes

Introduction

Have you ever wondered how all the food that you eat gets digested? It is not only the acid in your stomach that breaks down your food—many little molecules in your body, called enzymes, help with that too. Enzymes are special types of proteins that speed up chemical reactions, such as the digestion of food in your stomach. In fact, there are thousands of different enzymes in your body that work around-the-clock to keep you healthy and active. In this science activity you will investigate one of these enzymes, called catalase, to find out how it helps to protect your body from cell damage.

Credits

Materials

• Safety goggles or protective glasses
• Dish soap (5 teaspoons)
• Dry yeast, 1 package (7 grams)
• Hydrogen Peroxide, 3% (at least 100 mL)
• Tablespoons (3)
• Teaspoon (1)
• Plastic Cups, 16 oz (5)
• Tap water
• Measuring cup
• Permanent marker
• Paper towel
• Optional: Food coloring