1. 1.What do the enzymes in the washing powder do? 2.Why does it say to wash at 40 o C? 8A6 Enzymes

2. What are enzymes? Enzymes are proteins made by cells Enzymes are biological catalysts

3. When enzymes are denatured they stop working. Denatured means that they lose their ability to do their job properly. Enzymes can become denatured when: - the temperature gets too high (human enzymes work best at 37  C). - the surroundings are too acid or alkaline. Denatured enzymes

4. Digestive enzymes work best at certain pH values. Ideal conditions Amylase prefers alkaline conditions. Proteases in the stomach prefer acid. Enzymes in the small intestine prefer alkaline conditions.

5. How can you show that amylase is breaking down starch? How will you know when starch has been broken down? What variables may affect how quickly the reaction happens? How will you measure and control the variables? What quantities of materials will you need? What equipment will you need? How will you make sure your investigation is safe? Enzyme investigation Think about these things before you start the investigation.

6. ProductEnzymeFood glucose lipaseamylase protease fatty acids protein starch amino acidsfat Which food, which enzyme, which product? Click to reveal the answers. proteaseproteinamino acids fatlipasefatty acids starchamylaseglucose