Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 15, Problem 39P
Interpretation Introduction
Interpretation :
Significance of free energy change in the reaction is to be determined.
The relation between free energy change (DG) and standard free energy change (DG89) must be determined.
The relation between the equilibrium constants and the reactant and product must be determined.
Concept introduction :
A living being requires free energy input for three major processes. First is during mechanical work in cellular movements and muscular contractions. Second is during the active transport of ions and molecules across the membrane. Third is during macromolecular synthesis.
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Select all statements that are correct. Note there might be more than 1 correct
statement.
From the Lineweaver-Burk plot the equilibrium constant (Keq) can be obtained
The Lineweaver-Burk plot gives a more accurate prediction for Vmax than the Michaelis-
Menten plot
The Lineweaver-Burk plot assumes that products and reactants are present at equal
concentrations during the entire time of the reaction
The Lineweaver-Burk plot shows velocity of reaction vs substrate concentration
The Lineweaver-Burk plot shows 1/velocity of reaction vs 1/substrate concentration
O
20°C
D)
//
E
For a Michaelis-Menten reaction, k₁=5 x 107/M-s, k-1-2 x 104/s, and k2=4 x 10²/s.
Calculate the Ks and KM for this reaction.
Does substrate binding achieve equilibrium or steady state?
The formation of maltose, a disaccharide, from two glucose molecules, is not energetically favorable. However, if this reaction is coupled with the hydrolysis of ATP, the reaction occurs more favorably.
Maltose + H2O = 2 Glucose , ΔG'o = -15.5 KJ/mol or -3.7 kcal/mol
a. Determine if the coupled reaction will occur spontaneously at standard state through calculating the Gibbs Free Energy of Reaction.
b. Calculate the equilibrium constant for each individual reaction, and for the coupled reaction (using free energy of reaction). Show that the equilibrium constant for the coupled reaction equals the equilibrium constants for the individual reactions multiplied together.
c. If the reaction medium contains the following chemical species at their given concentrations (298 K and 1.0 atm, pH = 7.0), will the reaction proceed in the forward or the reverse direction? [Maltose] = [Glucose] = 10.0 mM; [ATP] = 5.0 mM; [ADP] = [Pi] = 20 mM
Chapter 15 Solutions
Biochemistry
Ch. 15 - Prob. 1PCh. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5PCh. 15 - Prob. 6PCh. 15 - Prob. 7PCh. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 10P
Ch. 15 - Prob. 11PCh. 15 - Prob. 12PCh. 15 - Prob. 13PCh. 15 - Prob. 14PCh. 15 - Prob. 15PCh. 15 - Prob. 16PCh. 15 - Prob. 17PCh. 15 - Prob. 18PCh. 15 - Prob. 19PCh. 15 - Prob. 20PCh. 15 - Prob. 21PCh. 15 - Prob. 22PCh. 15 - Prob. 23PCh. 15 - Prob. 24PCh. 15 - Prob. 25PCh. 15 - Prob. 26PCh. 15 - Prob. 27PCh. 15 - Prob. 28PCh. 15 - Prob. 29PCh. 15 - Prob. 30PCh. 15 - Prob. 31PCh. 15 - Prob. 32PCh. 15 - Prob. 33PCh. 15 - Prob. 34PCh. 15 - Prob. 35PCh. 15 - Prob. 36PCh. 15 - Prob. 37PCh. 15 - Prob. 38PCh. 15 - Prob. 39P
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