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Central Experiment: The Action Of An Enzyme  

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Enzyme Experiments Central Experiment: The Action Of An Enzyme, e.g., amylase converting starch to reducing sugar. 1. Substrate: starch - use the same volume of the same starch solution each time 2. Enzyme: amylase - use the same volume of the same amylase solution each time 3. Only use starch and amylase solutions that test negative for reducing sugar with Benedict's Reagent 4. Four test tubes individually one third full of (a) starch solution, (b) amylase solution, (c) starch solution and (d) water 5. Warm all to 37°C in a heated water bath at 37°C 6. Mix (a) and (b) - the experiment. Mix (c) and (d) - the control 7. Use a buffer to maintain the pH at a constant suitable value: pH 8 8. Every minute test a small sample of each for starch using iodine 9. Control Results: always blue-black - starch always present, starch not broken down 10....

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