Question

when a chemical bond is broken, ______ is released.
o energy
o the cofactor
o the enzyme
o the substrate

Explanation:

Breaking a chemical bond requires energy input in most cases, but when a chemical - bond is broken in a reaction that is overall exothermic, energy is released. Cofactors, enzymes, and substrates are not released when a chemical bond is broken in general chemical - bond breaking scenarios.

Answer:

energy