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Exam II Sample (1710)

Exam II Sample (1710) - Principles of Biology Exam II...

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Principles of Biology Exam II, Sample Questions 1. A molecule loses electrons as a result of a chemical reaction. This molecule has been: a. metabolized. b. oxidized. c. reduced. d. endergonicly modified. e. exergonicly modified. 2. Proteins which act as catalysts of chemical reactions [in cells] are called: 3. The pigment molecule found at the reaction center of photosystem II is: 4. The DG for a reaction is negative. This reaction is said to be: 5. A final product of a metabolic pathway inhibits an early enzyme in the pathway. This is likely to be an example of: a. competitive inhibition. b. feedback inhibition. c. cooperativity. d. energy coupling. e. a second messenger. 6. The strategy of using ATP hydrolysis to drive another reaction which is thermodynamically unfavored is called: 7. Protein catalyzed reactions move forward more readily than uncatalyzed reactions because:
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_______________________________________________________________________ Using the energy profile for the reaction above, match the following: 8. Activation energy 9. DG 10. Free energy of reactants 11. Free energy of products 12. The reaction depicted above has a DG which is: a. positive. b. negative. c. Since it is enzyme catalyzed, DG is near zero. _______________________________________________________________________ 13. The second law of thermodynamics states that for chemical reactions:
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