Enzyme | Definition, Mechanisms, & Nomenclature | Britannica
网页2024年9月16日 · 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. Learn more about enzymes in this article.
Enzymes: Function, definition, and examples - Medical News Today
网页2023年12月8日 · Enzymes help with the chemical reactions that keep a person alive and well. For example, they perform a necessary function for metabolism, the process of breaking down food and drink into energy.
Enzymes: What Are Enzymes, Pancreas, Digestion & Liver Function
网页2021年5月12日 · 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.
Enzyme - Wikipedia
网页Enzymes (/ ˈ ɛ n z aɪ m z /) are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
5.2: Enzymes - Biology LibreTexts
网页Enzymes are biological catalysts that accelerate chemical reactions by lowering the activation energy. Enzymes are proteins consisting of one or more polypeptide chains. Enzymes have an active site that provides a unique chemical environment, made up of certain amino acid R groups (residues).
Enzyme: Definition, Types, Structure, Functions, & Diagram
网页2021年11月11日 · Enzymes are protein macromolecules that are necessary to initiate or speed up the rate of chemical reactions in the bodies of living organisms. The molecules on which enzymes act are called substrates, and the substance formed is called the product. They are found in all living cells that vary in type based on the function it performs.
Protein - Enzymes, Structure, Function | Britannica
网页2024年9月23日 · Protein - Enzymes, Structure, Function: Practically all of the numerous and complex biochemical reactions that take place in animals, plants, and microorganisms are regulated by enzymes.
6.5: Enzymes - Biology LibreTexts
网页Explain how enzymes function as molecular catalysts. Discuss enzyme regulation by various factors. A substance that helps a chemical reaction to occur is a catalyst, and the special molecules that catalyze biochemical reactions are called enzymes.
Enzymes and the active site (article) | Khan Academy
网页Enzymes as biological catalysts, activation energy, the active site, and environmental effects on enzyme activity.
Enzyme Biochemistry - What Enzymes Are and How They Work
网页2018年5月28日 · An enzyme is defined as a macromolecule that catalyzes a biochemical reaction. In this type of chemical reaction, the starting molecules are called substrates. The enzyme interacts with a substrate, converting it into a new product. Most enzymes are named by combining the name of the substrate with the -ase suffix (e.g., protease, urease).