Aconitase catalyzes the citric acid cycle reaction: citrate <==> isocitrate. The standard free energy change, ΔGo ’, for this reaction is +6.7 kJ/mol. However, the observed free energy change (ΔG) for this reaction in pig heart mitochondria is +0.8 kJ/mol. What is the ratio of [isocitrate]/[citrate] in these mitochondria? If [isocitrate] = 0.03 mM, what is [citrate]

A. [isocitrate]/[citrate] = 0.724

B. [citrate] = 24.1 mM

Explanation:

Using the equation, ∆G'° = -RTlnK'eq

Where, ∆G'° = 0.8 KJ/mol = 800 J/mol; R is molar gas constant = 8.315 J/mol; T is standard temperature = 298 K; Keq is equilibrium constant = [isocitrate]/[citrate]

Making Keq subject of formula in the above equation;

Keq = e^(-∆G'°/RT)

= e^ {-800/(8.315*298)}

= e^(-0.323)

Keq = 0.724

Therefore, [isocitrate]/[citrate] = 0.

724

B. Keq = [isocitrate]/[citrate]

Where Keq = 0.724, [isocitrate] = 0.03mM.

[citrate] = Keq/[isocitrate]

= 0.724/0.03

[citrate] = 24.1 mM

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

l dont know l am s sorry