The given series of reactions, with the unknown nature of reactants (i.e. reactant names are just represented by letters), cannot be identified because the chemical changes they undergo cannot be seen. However, the thermodyamics of the reaction through the behavior of side reactions can assist in determining the direction of the energy involved in the reaction.
In the pathway below, B → C is coupled with ADP → ATP. Categorize the reactions as endergonic or exergonic.
A. B → C is endergonic and ADP → ATP is exergonic.
B. ADP → ATP is endergonic and B → C is exergonic.
C. Both B → C and ADP → ATP are endergonic.
D. Both B → C and ADP → ATP are exergonic.
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