Answer:
Unfavorable reactions: Reaction A and Reaction B.
Coupled reactions favorable: Reactions B and C and Reactions A and C.
Net change:
Reactions B and C
: -14.2kJ/mol
Reactions A and B
: 30.1kJ/mol
Reactions A and C: -16.7kJ/mol
Explanation:
A reaction is thermodynamically favorable (spontaneous) if ΔG < 0. Thus, the unfavorable reactions -ΔG > 0- are:
Reaction A and reaction B.
When reaction C is coupled with reaction B and reaction A the chemical equation is:
ATP + fructose-1,6-phosphate ⟶ ADP + fructose-1,6-bisphosphate
ΔG = 16.3 - 30.5 = -14.2 kJ/mol
ATP + glucose ⟶ ADP + glucose-6-phosphate
ΔG = 13.8 - 30.5 = -16.7 kJ/mol
The coupled reaction of A and B has a change in free energy of:
ΔG = 13.8 + 16.3 = 30.1 kJ/mol
