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Amylase Mouth Lipase Splat Amylase Carbohydrase Protease Glycerol Acid Glucose Amino acids Intestine Alkali Stomach Mouth Lipase Carbohydrase Protease Glycerol Acid Alkali Glucose Amino acids Intestine Stomach Objectives A* - Explain how specific conditions allow enzymes to do their jobs AND evaluate the results of tests A – Describe the progress of digestion using the keyword names of enzymes AND explain using ideas of enzymes B – Know the purpose of digestion and the food molecules and what they are broken down into AND describe the results of tests Enzymes – • Amylase – Saliva, pancreas and small intenstine • Protease – Stomach juice, Pancreas • Carbohydrase – Pancreas • Lipase – Pancreas and Small Intestine • HCl – Stomach • Bile – Gall bladder Enzymes – • Amylase – Digests starch to sugars • Protease – proteins to amino acids • Carbohydrase – Sugars to smaller sugars • Lipase – Fat into glycerol and fatty acids • HCl – Optimum conditions • Bile – Emulsification and alkaline Describe then explain 1 8 2 7 3 6 4 5 Spit was added to starch and iodine. Each well was taken from the total mixture after 30 seconds. Amylase Boiled saliva 1. What are your results? Describe in as much detail as possible. 2. Can you explain your results from test tube A Saliva 3. Can you explain why test tube B had different results? Lipase 1. What are your results? Describe in as much detail as possible. 2. Phenolphthalein is pink in alkaline conditions and is colourless in acid or neutral conditions. Can you explain your results Lipase Boiled lipase 3. Why do you add sodium carbonate (alkaline) Lipase & bile salts 4. If you measured the pH of each tube what would you find and why Pepsin 1. What are your results? Describe in as much detail as possible. 2. Can you explain your results? Pepsin & egg white Egg white & acid Egg white, acid & pepsin Egg white, acid & boiled pepsin 3. Why do you get different results with hydrochloric acid? Amylase Mouth Lipase Splat Amylase Carbohydrase Protease Glycerol Acid Glucose Amino acids Intestine Alkali Stomach Mouth Lipase Carbohydrase Protease Glycerol Acid Alkali Glucose Amino acids Intestine Stomach