Which type of molecule predominantly constitutes enzymes?

Enzymes are primarily composed of proteins, which play a crucial role in facilitating biochemical reactions in living organisms. These protein molecules function as biological catalysts, meaning they accelerate chemical reactions without being consumed in the process. Each enzyme has a specific structure that determines its function, known as its active site, which allows substrates to bind and undergo a chemical transformation.

The activities of enzymes are influenced by several factors such as temperature, pH, and substrate concentration, which can impact their effectiveness. While other types of biomolecules, like nucleic acids and carbohydrates, serve important functions in biological systems, they do not predominantly serve as enzymes. Nucleic acids are responsible for storing and transmitting genetic information, while carbohydrates primarily provide energy and structural support. Lipids, on the other hand, are involved mainly in cellular structure and energy storage. Therefore, proteins are the specific class of molecules that constitute enzymes, highlighting their essential role in biological processes.