An endergonic reaction has ΔG∘=+50.0kJmol−1. Hydrolysis of one molecule of ATP to ADP + Pi has ΔG∘=−30.5kJmol−1. What is the MINIMUM whole number of ATP molecules that must be hydrolyzed per mole of the endergonic reaction to make the overall process favorable under standard conditions?
a) 3
b) 2
c) The reaction cannot be driven by ATP hydrolysis
d) 1