1. ENZYMES 1 ENZYMES Quick Quiz 1 Press the button when you’re sure… remember to take your time as you only get one chance!

2. ENZYMES 1 What 2 substances are made in the break down of the hydrogen peroxide by manganese dioxide? 1. Water and carbon dioxide 2. Water and carbon dioxide 3. Oxygen and food 4. Oxygen and water

3. ENZYMES 1 Which substance could we easily see being produced in this reaction? 1. Water 2. carbon dioxide 3. Oxygen 4. detergent

4. ENZYMES 1 What effect does the catalyst have on the break down of hydrogen peroxide? 1. Slows it down 2. Speeds it up 3. No effect 4. Turns hydrogen peroxide black

5. ENZYMES 1 How could we prove that the gas given off was in fact oxygen gas? 1. The gas would blow out a wooden splint 2. The gas would relight a glowing splint 3. The gas would blow out a glowing splint 4. The gas would relight a wooden splint

6. ENZYMES 1 Our livers contain an enzyme called catalase, which breaks down toxic (harmful) hydrogen peroxide into water and oxygen. 1. TRUE 2. FALSE

7. ENZYMES 1 Both the enzyme catalase and the chemical manganese dioxide break down hydrogen peroxide. 1. TRUE 2. FALSE

8. ENZYMES 1 Only catalase enzyme breaks down hydrogen peroxide. 1. TRUE 2. FALSE

9. ENZYMES 1 The enzyme catalase speeds up the break down of hydrogen peroxide which is a harmful substance. 1. TRUE 2. FALSE

10. ENZYMES 1 There is no difference between a biological washing powder and a non- biological washing powder in terms of the energy they use. There is no difference between a biological washing powder and a non- biological washing powder in terms of the energy they use. 1. TRUE 2. FALSE

11. ENZYMES 1 Enzymes are biological catalysts which speed up the rate of chemical reactions. Enzymes are biological catalysts which speed up the rate of chemical reactions. 1. TRUE 2. FALSE

12. ENZYMES 1 Enzymes can be extracted from plants and animals and used to clot milk to make cheese. 1. TRUE 2. FALSE

13. ENZYMES 1 Non-biological washing powders have enzymes added to them. 1. TRUE 2. FALSE

14. ENZYMES 1 Human enzymes work best below a temperature of 30°C. 1. TRUE 2. FALSE

15. ENZYMES 1 Enzymes are biological catalysts which slow down the rate of chemical reactions. 1. TRUE 2. FALSE

16. ENZYMES 1 Manganese dioxide is an enzyme, as it speeds up the chemical reaction. 1. TRUE 2. FALSE