Question

in cells, what is usually the immediate source of energy for an endergonic reaction?
sugar
glucose
adp
as spontaneous reactions, endergonic reactions do not need an addition of energy
atp

Explanation:

ATP (adenosine triphosphate) is known as the energy currency of the cell. It releases energy when its high - energy phosphate bonds are broken (ATP → ADP + Pi). Endergonic reactions are reactions that require an input of energy. Sugar and glucose need to be metabolized (like in cellular respiration) to produce ATP. ADP is the product when ATP donates its energy. And endergonic reactions are non - spontaneous and do need an energy input.

Answer:

ATP