Different enzymes Carry out other enzyme a model or large poster of Investigate the optimum phenolphthalein or work best at different controlled investigations as the digestive system identify pH values for pepsin UI solution, lipase temperatures and pH appropriate. where each type of enzyme and trypsin enzymes. solution, +/- washing values. and bile is produced. up liquid and timer. Calculate the rate of enzyme Relate the results to Add labels to the digestive controlled reactions. their sites of action in pH: Pepsin solution, system diagram to show where the digestive system. trypsin solution, Interpret the results from the different enzymes and bile buffer solutions at enzyme controlled reactions. Investigate the effect of Required practical: are produced. different pH values, temperature on amylase Food tests. UI strips, egg white activity measure time Optional investigations or use – suspension, test Use qualitative taken for starch to computer simulations and tubes, timers and reagents to test for a disappear. Plot results interpret and explain the goggles. of carbohydrates, and find optimum results: lipids and proteins. To temperature for Amylase: amylase investigate the include: Benedict’s test amylase. solution, starch optimum pH values for for sugars; iodine test solution, test tubes, pepsin and trypsin. Plot and interpret graphs for starch; and Biuret water baths at about enzyme activity; investigate the effect reagent for protein. different determine optimal of temperature on temperatures, temperatures and pH amylase activity. thermometers, glass values. Use the BBC activity the rods, spotting tiles, iodine solution, digestive system. timers, goggles. Make a life size of the digestive system. Role play What happens to – food as it along the digestive system?
Different enzymes work best at different temperatures and pH values. Required practical: Food tests. Use qualitative reagents to test for a of carbohydrates, lipids and proteins. To include: Benedict’s test for sugars; iodine test for starch; and Biuret reagent for protein. Carry out other enzyme controlled investigations as appropriate. Calculate the rate of enzyme controlled reactions. Interpret the results from enzyme controlled reactions. a model or large poster of the digestive system identify where each type of enzyme and bile is produced. Add labels to the digestive system diagram to show where the different enzymes and bile are produced. Optional investigations or use computer simulations and interpret and explain the results: investigate the optimum pH values for pepsin and trypsin. investigate the effect of temperature on amylase activity. Use the BBC activity the digestive system. Make a life size of the digestive system. Role play – What happens to food as it along the digestive system? Investigate the optimum pH values for pepsin and trypsin enzymes. Relate the results to their sites of action in the digestive system. Investigate the effect of temperature on amylase activity – measure time taken for starch to disappear. Plot results and find optimum temperature for amylase. Plot and interpret graphs about enzyme activity; determine optimal temperatures and pH values. phenolphthalein or UI solution, lipase solution, +/- washing up liquid and timer. pH: Pepsin solution, trypsin solution, buffer solutions at different pH values, UI strips, egg white suspension, test tubes, timers and goggles. Amylase: amylase solution, starch solution, test tubes, water baths at different temperatures, thermometers, glass rods, spotting tiles, iodine solution, timers, goggles.
AQA-8461-SOW-ORG.DOCX