Energy & enzymes

1) Bioenergetics is the quantitative study of energy transformations in living cells and the chemical processes underlying them. 2) Enzymes are protein catalysts that lower the activation energy of metabolic reactions in cells. They achieve high reaction rates and specificity. 3) ATP acts as the universal energy currency in cells, coupling exergonic reactions that produce it to endergonic reactions that consume it. This permits the storage and transport of energy throughout biological systems.