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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 which …

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

    Jan 12, 2026 · 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 …

  3. Enzymes – Definition, Examples, Function

    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 lowering the …

  4. Enzymes: Definition, function, and examples - Medical News Today

    Jan 15, 2026 · 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 …

  5. Enzymes: What Are Enzymes, Pancreas, Digestion & Liver Function

    May 12, 2021 · 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 …

  6. What Are Enzymes and Their Functions? 6 Types in the Body

    Enzymes are proteins that are made up of several polypeptide chains, also called amino acids, that have undergone repetitive folding and coiling. They have three-dimensional structures made of linear …

  7. Enzymes: What They Are and How They Work - Verywell Health

    Dec 8, 2025 · 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 …

  8. Enzymes - Definition, Structure, Classification, Examples

    Jul 23, 2025 · Enzymes are biological molecules that act as catalysts, speeding up chemical responses in living organisms. They work by lowering the activation energy needed for a response to do, …

  9. 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 …

  10. Enzyme - National Human Genome Research Institute

    3 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 chemical reaction.