Question

multiple choice question
certain reactions in cells are endergonic. how do cells make those reactions proceed?
they couple them with other endergonic reactions.
they couple them with atp synthesis.
they couple them with atp hydrolysis.
they use enzymes to turn them into exergonic reactions.

Explanation:

Endergonic reactions require energy input. ATP hydrolysis releases energy. Cells couple endergonic reactions with ATP hydrolysis to provide the necessary energy for the endergonic reactions to proceed. Enzymes only lower activation - energy and do not change a reaction from endergonic to exergonic. Coupling with other endergonic reactions or ATP synthesis won't provide the needed energy.

Answer:

They couple them with ATP hydrolysis.