1. Enzymes and Catalysts Learning Outcomes Understand that enzymes are catalysts produced by living cells How temperature can affect the rates of enzyme catalysed reactions Its time for the weekly wash in my house, my Mother in-law is down to stay.... Hence the Mask! Somewhere in the country where nothing much happens.... Ever....

2. Have you ever wondered whats in Washing Powder? Crushed Chalk? Mrs Skunk makes Rosie do some of her chores.....

3. That's because they have been washed in water! But its not the water that breaks down the food stains, its something else. Do you know what? No can you help me? But, how are your clothes clean when they have finished being washed? Click here for Task Discuss how clothes are cleaned in the washing machine

4. I Get it now, I will tell Mrs Skunk. Enzymes are biological catalysts - catalysts are substances that increase the rate of chemical reactions without being used up. Enzymes are also proteins that are folded into complex shapes that allow smaller molecules to fit into them The place where these substrate molecules fit is called the active site.

5. Time to check on my washing... Now I know how it gets clean. Who would have thought it, Washing powder contains enzymes that are responsible for cleaning the clothes! Oh No! The Chief is in the bath.. Where are the clothes! Trying to clean clothes? Well it didnt work, everything was still dirty. You must have denatured the enzymes somehow? !!! Click here for Task What does denatured mean and how does it occur?

6. Time Limit? Reporting your findings Maybe I set the Water Temperature at the wrong levels? Bath Temperature? Dirty Smelly Clothes ? Washing Powder What would you expect to see? Click here for Task Design a practical to investigate how Temperature can affect the rates of an enzyme catalysed reaction try to include the key words below :

7. Drag the statements in the correct position on the graph... As the temperature increases, so does the rate of reaction Very high temperatures denature enzymes. The enzyme activity increases with temperature to about 37ºC The rate of reaction falls rapidly, as heat energy denatures the enzyme.

8. Temperature of Wash Informative Educational Cheap Efficient Environ mentally Friendly Fashionable Original No need for second wash Click here for the Task DAZ CHALLENGE: Design a Washing Powder to Sell to Students in University....carry on clicking for things to think about

9. To Summarise... Temperature can affect the rates of enzyme catalysed reactions Enzymes are catalysts produced by living cells