at standard conditions with [Y) 1 M and [X]-I M, AG is number. As the reaction p
ID: 202045 • Letter: A
Question
at standard conditions with [Y) 1 M and [X]-I M, AG is number. As the reaction proceeds, [Y] decreases and x 3-34 For the reaction YX initi ally a large negative increases until the system as the reaction equi the equilibrniun ouem reaches equilibriurn. How do the values of AG and AG (a) and 0" stays G becomes less negative G becomes positive and AF becomes pos G stays the same and AF becomes l AG reaches zero and AG® becomes more negative. positive. less negative. 3-35 Which of the following is true for a (c) RT In [XY]- 3-36 The equilibrium constant (k) for the reaction eis d Which of the expressions YX can be expressed with respect to the expressions below concentrations of the reactant and product molecules. the corect relationship between K, [Y), and XT (a) K-MX] (b) K- [Y [X] (c) K-[XVTY] 3-37 Although the biochemical study of reaction rates and free energies is important for understanding each biological reaction individually, these studies do not provide an accurate picture of what is happening to reactants and products inside the cell. Why not? 3-38 Isomerization of glucose 1-phosphate to glucose 6-phosphate is energetically favorable. At 37°C·AF=-1.42 logi K, what is the equilibrium constant for this reaction ifa -1.74 kcal/mole at 37°C? (a) 16.98 (b) 0.09 (c) -0.09 (d) 0.39 3-39 On the basis of the two reactions below, decide which of the following statements are true and which are false. If a statement is false, explain why it is false. 1: ATP + Y Y,P + ADP G=-100kcal/mole G-50 kcal/mole Y-P + A B Reaction l is favorable because of the large negative G associated with the hydrolysis of ATP 2: A. Page 9 of 21Explanation / Answer
3-34. d) deltaG= deltaGo + RTlnQ
deltaGo is negative at equilibrium
Q increases due to the reaction as we get more product making RTlnQ more positive. This in turn makes deltaG zero.
3-35. b)) same as above
36. c)
37. because inside the cell, a lot of biochemicals are present participating in reactions which may interact in a more complex way than a biochemical study of free energies etc. for a particular biochemical being studied.
38. (b)
deltaGo = -1.42log10K
-1.74kcal/mol= -1.42log10K
0.086 or 0.09
39, is incomplete
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