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.

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?

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: 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 - Simple English Wikipedia, the free encyclopedia
An enzyme is a protein molecule in cells which works as a biological catalyst. [1] Enzymes speed up chemical reactions but do not get used while doing so, so they can be used over and over again.

Enzyme: Definition, Types, Structure, Functions, & Diagram
Any substance that speeds up a biochemical reaction without being a reactant is called a catalyst. The catalysts for biochemical reactions in living systems are known as enzymes. They are thus known as biological catalysts or biocatalysts.

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

Enzymes: principles and biotechnological applications - PMC
Enzymes are biological catalysts (also known as biocatalysts) that speed up biochemical reactions in living organisms. They can also be extracted from cells and then used to catalyse a wide range of commercially important processes.