In order for any endergonic reaction to proceed, energy must be provided by a coupled exergonic reaction. There is virtually always more energy released by the exergonic reaction than is consumed by the endergonic reaction. The energy left over is .

The correct answer is : Released as the heat.

Explanation:

Exergonic reactions that are occurs on it own as there is no need of the energy to initiate these reactions whereas endergonic reactions requires some amount of the energy to initiate it and the required energy come from the exergonic reactions provide a large amount of energy in by breaking the bonds.

Endergonic reactions require less amount than that is released from that released from the exergonic reaction. The energy that is left is lost as the heat after consumed energy by endergonic reaction.

Thus, the correct answer is : Released as the heat.

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