32 draw a graph to show the change in energy from

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32. Draw a graph to show the change in energy from reactant to product over the course of an exergonic reaction, include a line for an enzyme-mediated version of the same reaction. Label: transition state, activation energy without an enzyme, activation energy with an enzyme, and energy released. 33. Explain the lock-and-key model of enzyme activity. Be sure to comment on what the active site of an enzyme does. How does the induced-fit hypothesis further refine this model? 34. How do temperature, salinity and pH affect enzyme activity? 35. What is a metabolic pathway? What is its function in cellular chemistry? 36. Compare and contrast competitive inhibition and allosteric regulation. 37. What is feedback inhibition? Discuss how ATP can act as an allosteric inhibitor for catabolic enzymes. How is this an example of feedback inhibition?
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3 Past Free-Response Questions on the AP Exam: The unique properties (characteristics) of water make life possible on Earth. Select THREE properties of water and: (a) for each property, identify and define the property and explain it in terms of the physical/chemical nature of water. (b) for each property, describe one example of how the property affects the functioning of living organisms. (a) How do (1) temperature and (2) pH affect the activity of this enzyme? In your answer, include a discussion of the relationship between the structure and the function of this enzyme, as well as a discussion of how structure and function of enzymes are affected by temperature and pH. (b) Describe a controlled experiment that could have produced the data shown for either temperature or pH. Be sure toe state the hypothesis that was tested here. Proteins large complex molecules are major building blocks of all living organisms. Discuss the following in relation to proteins. (a) The chemical composition and levels of structure of proteins. (b) The roles of DNA and RNA in protein synthesis. (c) The roles of proteins in membrane structure and transport of molecules across the membrane. Enzymes are biological catalysts. (a) Relate the chemical structure of an enzyme to its specificity and catalytic activity. (b) Design a quantitative experiment to investigate the influence of pH or temperature on the activity of an enzyme. (c) Describe what information concerning the structure of an enzyme could be inferred from your experiment. Water is important for all living organisms. The functions of water are directly related to its physical properties.
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