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  1. Enzyme - Wikipedia

    An enzyme (/ ˈɛnzaɪm /) is a protein that acts as a biological catalyst, accelerating chemical reactions without being consumed in the process. The molecules on which enzymes act are …

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

    Jul 12, 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. Enzyme: Definition, Types, Structure, Functions, & Diagram

    Nov 11, 2021 · 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 …

  4. 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 …

  5. 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 …

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

    Dec 8, 2023 · Enzymes help with specific functions that are vital to the operation and overall health of the body. They help speed up chemical reactions in the human body. They are …

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

    Oct 22, 2024 · 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 …

  8. What Is an Enzyme Molecule and How Does It Function?

    Jul 26, 2025 · Enzymes are primarily protein molecules, though some are made of RNA and are known as ribozymes. They function as biological catalysts, speeding up biochemical reactions …

  9. Enzyme | definition of Enzyme by Medical dictionary

    any protein that acts as a catalyst, increasing the rate at which a chemical reaction occurs. The human body probably contains about 10,000 different enzymes. At body temperature, very few …

  10. 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 …

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