Respuesta :
In coupled reaction, one reaction has a positive delta G while other has large negative delta G. And combining these two reaction net reaction has negative delta-G, thus proceed in desired direction.
Most of the anabolic reactions or constructive reactions in the cells are not energetically favourable that is, delta G is positive. And chemically only those reactions occur which are energetically favourable that is delta G is negative. To overcome this problem cell utilize the energy which is conserved in the form of ATP. Phosphate bonds are present in ATP are high energy bonds, when it is hydrolyze, hey will produce large amount of energy. This high energy is used by the cell to overcome from the energy requirement in the other non favourable reaction where delta G is positive. This is termed as the coupled reaction, in which one reaction has a positive delta G while other has large negative delta G. Thus, combining these two reactions the net delta-G of the reaction becomes negative and reaction moves into the desired direction.
To learn more about spontaneous reaction visit the link- https://brainly.com/question/14061406#:~:text=What%20is%20spontaneous%20reaction%3F,spontaneous%20reactions%20generate%20free%20energy.
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