Enzyme - Wikipedia
An enzyme is a biological macromolecule, usually a protein, that acts as a biological catalyst, accelerating chemical reactions without being consumed in the process. The molecules on which enzymes act are called substrates, which are converted into products.

Enzyme | Definition, Mechanisms, & Nomenclature | Britannica
Enzyme, a catalyst that regulates the rate at which chemical reactions proceed in living organisms without itself being altered in the process. Most critically, enzymes catalyze all aspects of cell metabolism.

Enzymes – Definition, Examples, Function
Enzymes are specialized proteins (and in some cases RNA molecules) that act as catalysts in living organisms. They speed up the chemical reactions required for life by lowering the activation energy, all without being consumed in the process.

Enzyme - National Human Genome Research Institute
The enzyme is not destroyed during the reaction and is used over and over. A cell contains thousands of different types of enzyme molecules, each specific to a particular chemical reaction.

Enzymes: What Are Enzymes, Pancreas, Digestion & Liver Function
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems. Enzymes in our blood can also help healthcare providers check for injuries and diseases. What are enzymes?

Enzymes: Definition, function, and examples - Medical News Today
Ions are inorganic molecules that loosely bond with the enzyme to ensure it can function. By contrast, coenzymes are organic molecules that also loosely bond with and allow an enzyme to do its...

ENZYME Definition & Meaning - Merriam-Webster
The meaning of ENZYME is any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures.

Enzyme: MedlinePlus Medical Encyclopedia
Blood clotting is another example of enzymes at work. Enzymes are needed for all body functions. They are found in every organ and cell in the body, including in the: Hall JE, Hall ME. Genetic control of protein synthesis, cell function, and cell reproduction.

Expasy - ENZYME
ENZYME is a repository of information relative to the nomenclature of enzymes.

What Is an Enzyme? Definition and Key Functions
An enzyme is a protein that speeds up chemical reactions in your body. Without enzymes, reactions that take milliseconds would instead take hours, days, or even years.