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Free Energy and Chemical Reactions

APBIO-KVWLHP

All biochemical pathways involve changes in free energy, and the graph below illustrates one type of free energy change between reactants and products in a chemical reaction.

Free Energy Change in a Chemical Reaction. Gray Mitchell, C. Created for Albert.io. Copyright 2016. All rights reserved.

Which of the following statements is a correct interpretation of the graph?

A

The reaction illustrated could represent cell respiration, which is endergonic and the change in free energy is positive ($\Delta G$ > 0).

B

The reaction illustrated could represent cell respiration, which is exergonic and the change in free energy is negative ($\Delta G$ < 0).

C

The reaction illustrated could represent the polymerization of glucose into glycogen, which is endergonic ​and the change in free energy is positive ($\Delta G$ > 0).

D

The reaction illustrated could represent the polymerization of glucose into glycogen, which is exergonic and the change in free energy is negative ($\Delta G$ < 0).