A. For each of the three reactions below, use the ?G° for each reaction to deter
ID: 280828 • Letter: A
Question
A. For each of the three reactions below, use the ?G° for each reaction to determine the equilibrium
constants (K). Recall that DG° = –1.42 log K at 37° C and assume that each reaction occurs independently of the other two.
Reaction 1: acetyl-Pa?acetate + P Reaction 2: ATPa?ADP + P
Reaction 3: glucose 6-Pa?glucose + P
B. Which reaction is more favorable
?G° (kcal/mole) K–10.3
– 7.3 – 3.3
Can you also help me with 11 and 12, Thank you so much.
Use the information below to answer the next three questions. An enzyme can catalyze a reaction with either one of two substrates (S1 or Se). The initial reaction rate (vo) for each of the substrates was measured (in nmoles/min) as a function of the concentration of substrate [Sl (uM), and the following results were obtained: IsI 0.0001 0.0002 0.0005 0.001 0.002 0.005 0.01 0.02 0.05 5.0 Vo (S) Vo (S2) 17 29 50 67 80 91 95 98 100 100 50 71 83 91 96 98 100 100 1 Adapted from: Chang R (2005) Physical Chemistry for the Biosciences, University Science Books, Herndon, VA. P.383.Explanation / Answer
Answer : glucose 6 p to glucose+p is the most favorable G.
Answer 11. Option c. S1Is a better substrate because it has a lower Km.
Answer 12. Option d 1/100.
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