APFIVE Free Energy of Coupled Reactions
A cell couples an exergonic reaction that releases 20 kJ of energy with an endergonic reaction that requires 10 kJ. What is the net free energy change (ΔG) of the overall coupled reaction?
A
0 kJ (they exactly cancel out)
B
10 kJ (net release of energy)
C
30 kJ (sum of released and required energies)
D
10 kJ (net absorption of energy)
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