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  1. 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 …

  2. Enzyme | Definition, Mechanisms, & Nomenclature | Britannica

    Oct 10, 2025 · 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 …

  3. 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 …

  4. Enzymes - Definition, Examples, Function - Science Notes and ...

    Mar 25, 2025 · 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 …

  5. Enzyme - National Human Genome Research Institute

    2 days ago · 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 …

  6. Enzymes: Function, definition, and examples - Medical News Today

    Dec 8, 2023 · 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 …

  7. 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 …