Enzymes 3.0 / 5 based on 1 rating ? BiologyEnzymes and digestionGCSEEdexcel Created by: Chloe ReynoldsCreated on: 24-02-13 22:43 What is an Enzyme? Chemical molecules that act as biological catalysts 1 of 19 Where do enzymes occur? Both plant and animal cells 2 of 19 What are enzymes made up of? Proteins 3 of 19 What is an "active site"? Where the reaction occurs 4 of 19 What do enzymes do? 1) Help to break down large molecules 2) Build up large molecules from small ones. 3) Help turn one molecule into another 5 of 19 What does "catalase" do? Breaks the chemical hydrogen peroxide down to water and oxygen 6 of 19 Where is "catalase" found? Catalase is found in all cells 7 of 19 What conditions need to be right for Enzymes? High enough substrate concentration, the pH must be correct, temperature 8 of 19 What does "denatured" mean? When the enzymes shape or active site is changed. The enzyme can no longer hold the substrate molecule 9 of 19 What is a "substrate molecule"?t A molecule upon which an enzyme acts 10 of 19 What will happen if the temperature is too low? If it is too cold the enzymes will move around too slowly to meet the substrate molecules, so the reaction rate is slowed 11 of 19 What will happen if the temperature is too high? his is because the extra heat energy shakes them around so much that the enzyme will become denatured 12 of 19 What reactions to enzymes control? Respiration, photosynthesis, and digestion 13 of 19 What reaction does Amylase cause? Starch → sugars 14 of 19 What reaction does Protease cause? Proteins → amino acids 15 of 19 What reaction does Lipase cause? Lipids → fatty acids + glycerol 16 of 19 Where is Amylase produced? Salivary glands, pancreas, small intestine 17 of 19 Where is Protease produced? Stomach, pancreas, small intestine 18 of 19 Where is Lipase produced? Pancreas, small intestine 19 of 19
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