Biochem Exam 2 Answers - Graphs A and B show the activity of

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Graphs A and B show the activity of phosphofructokinase. To answer questions 1-5, use the graphs and the terms to the right and fill in the correct letter on your answer sheet. Terms may be used more than once or not at all. Questions 1-5 are worth 2 points each. 1. Compound m gives this enzyme _ B _ kinetics 2. In a diagram of free energy versus reaction progress, the point of highest energy is known as the __ I ___ state. 3. Compound m does not change the enzyme’s __ J __ when substrate y is held constant. 4. In addition to serving as a substrate, substrate y is an __ A _ for the enzyme. 5. The complex kinetic behavior of this enzyme makes it a good regulator for ____ D ___ a) Allosteric effector b) hyberbolic c) sigmoidal d) glycolysis e) gluconeogenesis f) active site g) competitive inhibitor h) irreversible inhibitor i) Transition j) V max 1
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6. Which of the following statements regarding simple Michaelis-Menten enzyme kinetics are CORRECT? E a. the maximal velocity, V max , is related to the maximal number of substrate molecules that can be “turned over” in unit time by a molecule of enzyme. b. K M is the dissociation constant of the enzyme-substrate complex. c. K M is the concentration of substrate required to achieve one-half of V max . d. a and b e. a and c f. all of the above 7. Which of the following statements about the different types of enzyme inhibition are CORRECT? E a. competitive inhibition is seen when the substrate and the inhibitor compete for the active site of the enzyme b. competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein c. competitive inhibitors are often similar in chemical structure to the substrates of the inhibited enzyme d. all of the above e. a and c 8. Membranes consist primarily of two kinds of molecules F a. nucleic acids b. phospholipids c. proteins d. all of the above e. a and b f. b and c 9. Integral membrane proteins G a. require detergents or organic solvents treatment for dissociation from the membrane b. require mild salt or pH treatment for dissociation from the membrane c. bind to the surface of membranes d. have transmembrane domains e. a and c f. b and d g. a and d h. b and c 10. Which of the following is NOT true for both a micelle and a lipid bilayer? C
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This note was uploaded on 04/12/2008 for the course BIOCHEM 099:100 taught by Professor Fulton during the Spring '07 term at University of Iowa.

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Biochem Exam 2 Answers - Graphs A and B show the activity of

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