Exergonic hydrolysis of ATP is linked with endergonic processes by transferring a phosphate group to another molecule. The regeneration of ATP ATP is continually regenerated by the cell. Enzymes A. Enzymes speed up metabolic reactions by lowering energy barriers Free energy change indicates whether a reaction will occur spontaneously, but does not give information about the speed of reaction. Biological catalysts made of protein. Energy profile of an exergonic reaction 1.
Reaction occurs and energy is released as new bonds form.
In an exergonic reaction the free energy of the products is less than reactants. The breakdown of biological macromolecules is exergonic. These molecules react very slowly at cellular temperatures because they cannot absorb enough thermal energy to reach transition state. The substance an enzyme acts on and makes more reactive. Restricted region of an enzyme molecule which binds to the substrate.