Enzymes 0.0 / 5 ? BiologyEnzymes and digestionGCSEWJEC Created by: ibellahollidayCreated on: 19-04-17 16:53 Properties of Enzymes biological catalysts proteins control the chemical reactions taking place in every cell all enzymes are specific and can only catalyse one type of molecule optimum pH optimum temperature if the temperature is higher or lower, the enzymes will catalyse the molecule at a much slower rate if the temperature is too high, the enzyme is denatured 1 of 4 Lock and Key Model a substrate is held in an active site, increasing the probability that a reaction will take place enzyme and substrate enzyme-substrate complex the enzyme is specific to a certain substrate enzyme and products enzyme unchanged at end of reaction 2 of 4 Biological Washing Powder contain digestive enzymes, allowing clothes to be washed at comparatively lower temperatures uses less energy lipase breaks down fats to fatty acids and glycerol protease breaks down proteins into amino acids carbohydrase breaks down starch to glucose uses less energy some people have allergies 3 of 4 Effect of pH on amylase (carbohydrase enzyme) three equal sized hole cut into agar jelly containing starch each hole is filled with the same volume and same concentration of a different enzyme solution left at 20 C after 30 minutes the petri dish is flooded with iodine solution 1% amylase at pH2 agar around hole stays black as the starch is not digested pH is too low for amylase 1% amylase at pH7 starch agar around hole becomes clear as starch has been digested optimum pH 1% boiled, cooled amylase agar around hole stays black as starch is not digested amylase has been denatured 4 of 4
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