In this lesson, we will learn how reactions with a large negative ΔG - that is, reactions that are very thermodynamically favorable - can be coupled to reactions that are very thermodynamically unfavorable. In this way, reactions that would never occur on their own can occur in cells. Think of a hydroelectric dam, where a thermodynamically unfavorable process such as charging a battery or generating electricity is linked to the thermodynamically favorable movement of water to a lower elevation. As the water loses potential energy, some of that energy is captured, since the movement cannot occur unless it spins a turbine that is tied to a generator.

This principle is found in many other contexts as well. Describe another process in which energy is expended in order to perform a task that is energetically unfavorable.

Please write your answer below. Think critically as you craft your response