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

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: What They Are and How They Work - Verywell Health
Enzymes are substances in the body that cause and speed up crucial chemical reactions. Enzymes’ function is to help trigger bodily processes ranging from digestion to blood clotting to growth. There are many types of enzymes, and most enzymes are proteins. If you’re missing a certain type of enzyme or have too little of it, that can lead to health conditions that can be serious.

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: Function, definition, and examples - Medical News Today
Ions are inorganic molecules that loosely bond to 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 - 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.

8.2: Enzyme Structure and Function - Biology LibreTexts
Enzymes lower the activation energy by binding to the reactant molecules and holding them in such a way as to speed up the reaction. The chemical reactants to which an enzyme binds are called substrates, and the location within the enzyme where the substrate binds is called the enzyme’s active site.

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.