What is the function of enzymes in biological reactions?

Enzymes play a critical role in biological reactions primarily by acting as catalysts. They facilitate and accelerate the rate of chemical reactions without being consumed in the process. Enzymes lower the activation energy required for a reaction to occur, thereby increasing the likelihood of the reaction happening. This ability to speed up reactions is essential for sustaining life, as many biological processes would occur at a rate too slow to support cellular functions without enzyme involvement.

For instance, in metabolic pathways, enzymes ensure that the chemical reactions necessary for various physiological functions happen quickly and efficiently, contributing to the regulation and efficiency of biological systems. This catalytic action distinctively sets enzymes apart from mere energy providers or inhibitors, which do not function in the same manner.