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Enzymes 1. In the diagram, which letter represents the ‘non-active site-directed inhibitor present’ curve: D B C A 2. In the diagram, which letter represents the ‘active site-directed inhibitor present’ curve: C D A B 3. Which of the following is not a commercial advantage of enzyme immobilization: enzyme easily recovered from reaction mixture the initial cost of the enzyme is reduced the thermal stability of the enzyme is increased the reaction can be carried out at higher temperatures 4. Chemicals (other than the substrate) that affect enzyme activity are called: mobilizers immobilizers exhibitors inhibitors 5. Enzymes used to break down proteins in biological washing powders belong to the group: lactases proteases lipases hydrolases 6. The diagram shows a typical relationship between enzyme activity and: temperature substrate concentration enzyme concentration pH 7. Enzymes speed up biochemical reactions by: increasing the activation energy of the reaction increasing the temperature of the reaction lowering the activation energy of the reaction lowering the temperature of the reaction 8. The diagram shows a typical relationship between enzyme activity and: enzyme concentration substrate concentration temperature pH 9. Enzymes belong to which group of chemicals: proteins polysaccharides lipids saccharides 10. Enzymes act as biological: substrates solvents inhibitors catalysts