Definitions for Enzymeˈɛn zaɪm

This page provides all possible meanings and translations of the word Enzyme

Princeton's WordNetRate this definition:(0.00 / 0 votes)

  1. enzyme(noun)

    any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

GCIDERate this definition:(0.00 / 0 votes)

  1. enzyme(n.)

    A protein produced by a living organism, capable of catalyzing a chemical reaction. Almost all processes in living organisms require some form of enzyme to cause the reactions to occur at a rate sufficient to support life. There are a very wide variety of enzymes, each specifically catalyzing a different chemical reaction, the sum of which cause the bulk of the physiological changes observed as life processes. Enzymes, like most proteins, are synthesized by the protein-synthetic mechanism of the living cell, at special sites on ribosomes, using the genetic information in messenger RNA transcribed from the genetic instructions stored as nuleotide sequences in the DNA (or in some viruses, the RNA) of the genome. Some examples of enzymes are: pepsin, diastase, rennet, DNA polymerase, invertase, glucose oxidase, protease, and ribonuclease. There are many other types of enzyme.

  2. Origin: [Pref. en- (Gr. 'en in) + Gr. zy`mh leaven.]

WiktionaryRate this definition:(0.00 / 0 votes)

  1. enzyme(Noun)

    A globular protein that catalyses a biological chemical reaction.

  2. Origin: From Enzym, created in 1878, by the German physiologist Wilhelm Kühne from ἐν and ζύμη.

Webster DictionaryRate this definition:(0.00 / 0 votes)

  1. Enzyme(noun)

    an unorganized or unformed ferment, in distinction from an organized or living ferment; a soluble, or chemical, ferment. Ptyalin, pepsin, diastase, and rennet are good examples of enzymes

  2. Origin: [Pref. en- (Gr. 'en in) + Gr. zy`mh leaven.]

FreebaseRate this definition:(0.00 / 0 votes)

  1. Enzyme

    Enzymes are large biological molecules responsible for the thousands of chemical interconversions that sustain life. They are highly selective catalysts, greatly accelerating both the rate and specificity of metabolic reactions, from the digestion of food to the synthesis of DNA. Most enzymes are proteins, although some catalytic RNA molecules have been identified. Enzymes adopt a specific three-dimensional structure, and may employ organic and inorganic cofactors to assist in catalysis. In enzymatic reactions, the molecules at the beginning of the process, called substrates, are converted into different molecules, called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell. Like all catalysts, enzymes work by lowering the activation energy for a reaction, thus dramatically increasing the rate of the reaction. As a result, products are formed faster and reactions reach their equilibrium state more rapidly. Most enzyme reaction rates are millions of times faster than those of comparable un-catalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts in that they are highly specific for their substrates. Enzymes are known to catalyze about 4,000 biochemical reactions. A few RNA molecules called ribozymes also catalyze reactions, with an important example being some parts of the ribosome. Synthetic molecules called artificial enzymes also display enzyme-like catalysis.

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'Enzyme' in Nouns Frequency: #2661


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