AP-Biology-Comprehensiive-Essay-Questions1.doc - AP Biology Essay Questions Basic Chemistry Water Biochemistry Enzymes and Metabolism 1 The unique

AP-Biology-Comprehensiive-Essay-Questions1.doc - AP Biology...

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AP Biology Essay Questions Basic Chemistry, Water, Biochemistry, Enzymes and Metabolism 1. 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. 2. Describe the chemical composition and configuration of enzymes and discuss the factors that modify enzyme structure and/or function. 3. After an enzyme is mixed with its substrate, the amount of product formed is determined at 10-second intervals for 1 minute. Data from this experiment are shown below: Time (sec) 0 10 20 30 40 50 60 Product formed (mg) 0.00 0.25 0.50 0.70 0.80 0.85 0.85 Draw a graph of these data and answer the following questions. a. What is the initial rate of this enzymatic reaction? b. What is the rate after 50 seconds? Why is it different from the initial rate? c. What would be the effect on product formation if the enzyme where heated to a temperature of 100 C for 10 minutes before repeating the experiment? Why? d. How might altering the substrate concentration affect the rate of the reaction? Why? e. How might altering the pH affect the rate of the reaction? Why? 4. 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 experiments . Cell Structure and Function, Cell division 5. Describe the fluid-mosaic model of a plasma membrane. Discuss the role of the membrane in the movement of materials through it by each of the following processes: a. Active transport b. Passive transport
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6. Describe the structure of a eukaryotic plant cell. Indicate the ways in which a nonphotosynthetic prokaryotic cell would differ in structure from this generalized eukaryotic plant cell. 7. Discuss the process of cell division in animals. Include a description of mitosis and cytokinesis, and of the other phases of the cell cycle. Do Not include meiosis. 8. A laboratory assistant prepared solution of 0.8 M , 0.6 M , 0.4 M , and 0.2 M sucrose, but forgot to label them. After realizing the error, the assistant randomly labeled the flasks containing these four unknown solutions as flask A, flask B, flask C, and flask D. Design an experiment, based on the principles of diffusion and osmosis , that the assistant could use to determine which of the flasks contains each of the four unknown solutions. Include in your answer (a) a description of how you would set up and perform the experiment: (b) the results you would expect from your experiments: and (c) an explanation of those results based on the principles involved. (Be sure to clearly state the principles addressed in your discussion.) 9. Cells transport substances across their membranes. Choose THREE of the following four types of
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  • Fall '08
  • Knight,J

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