[Campbell Biology P.211] In biological systems, which of the following best describes an exe... | Practice Question

In biological systems, which of the following best describes an exergonic reaction?

  • A: It requires an input of energy and has a positive ΔG.
  • B: It releases energy and has a negative ΔG.
  • C: It occurs only when coupled with an endergonic reaction.
  • D: It leads to a decrease in the stability of the system.

Explanation

An exergonic reaction is a spontaneous chemical reaction that releases energy, meaning the products have less free energy than the reactants. This is indicated by a negative change in free energy –ΔG . Such reactions increase the stability of the system.