In another key reaction in glycolysis, phosphate (DHAP) is isomerized into glyce

Question

In another key reaction in glycolysis, phosphate (DHAP) is isomerized into glyceraldehyde-3-phosphate (GAP): Because deltaG' is positive, the equilibrium lies to the left. Calculate the equilibrium constant, and the equilibrium fraction of GAP from the above, at 37degreeC. Express your answer using two significant figures. In the cell, depletion of GAP makes the reaction proceed. What will deltaG be if the concentration of GAP is always kept at 1/100 of the concentration of DHAP? Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

part A

DG0 = -RTlnKeq

7.5*10^3 = -(8.314*(37+273.15))lnk

keq = 5.4*10^(-2)

part B

from equation

Keq = [GAP]/[DHAP]

So that, Keq will be less than zero.there fore DG is +ve always.

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