Biology ISA 2.0 / 5 based on 1 rating ? Human BiologyASAQA Created by: amieCreated on: 13-03-13 19:14 Title of ISA Effect of sodium chloride concentration on amylase rate 1 of 12 Why use syringes rather then measuring cylinders More Precise 2 of 12 Why use a starch buffer Maintain pH, allowing it to stay constant 3 of 12 Why was this buffer at pH7 optimum pH for amylase 4 of 12 Why leave test tubes in a water bath for 10 minutes Bring them all up tot he same temperature as the enzyme amylase 5 of 12 Why did you keep all the solutions at the same temperature Same rate of reaction, and also the same number of collisions would occur 6 of 12 Why is checking the colour change in the iodine to see when the reaction has finished a problem? Peoples views are different, you could have aspects such as reflection from the light which could give you a bias answer 7 of 12 Why does amylase only work on starch? The active site is specific to starch 8 of 12 How could you make your results more precise? Smaller intervals and repeat 9 of 12 how would you calculate the rate from a graph work out the gradient (y divided by x) 10 of 12 give 2 symptoms of lactose intolerance stomach cramps, nausea, diarrhoea, weight loss 11 of 12 Evaluate means = PRO's AND CON's 12 of 12
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