The products of a reaction can have less energy than the reactants. The products of a reaction can have more energy than the reactants. Reversible reactions tend to approach an equilibrium. Most reactions are reversible. They release energy.
Glucose metabolism is an example.
Their products have more energy than the reactants. There is an energy loss. Bonds are broken. A biosynthetic pathway can be characterized as a. degradative. Each enzyme can catalyze a wide variety of different reactions.