A precursor is something that existed before and was incorporated into something that came later. Also known as a forerunner or predecessor. This page is a candidate for speedy deletion. ...

For example, cacao is a precursor of chocolate, but chocolate is not a precursor of ice cream. There, chocolate is an ingredient. Binomial name Theobroma cacao L. For the town in French Guiana see Cacao, French Guiana Cacao (Theobroma cacao) is a small (4–8 m tall) evergreen tree in the family Sterculiaceae (alternatively Malvaceae), native to tropical South America, but now cultivated throughout the tropics. ... Chocolate most commonly comes in dark, milk, and white varieties, with cocoa solids contributing to the brown coloration. ... Missing image Ice cream is often served on a stick Boxes of ice cream are often found in stores in a display freezer. ... This article is being considered for deletion in accordance with Wikipedias deletion policy. ...

Biology

In biological processes especially metabolism, a precursor is a substance from which another, usually more active or mature substance is formed. Santorio Santorio (1561-1636) in his steelyard balance, from Ars de statica medecina, first published 1614 Metabolism (from μεταβολισμος (metabolismos)) is the biochemical modification of chemical compounds in living organisms anggjgjhnd cell (b). ...

For instance, certain liver enzymes are precursors to insulin. Or, this is the opposite of the body breaking down a more complex substance, like protein into individual chemicals for use within the body. The liver is the largest internal organ of the human body. ... Neuraminidase ribbon diagram An enzyme (in Greek en = in and zyme = blend) is a protein, or protein complex, that catalyzes a chemical reaction and also controls the 3D orientation of the catalyzed substrates. ... Insulin is not chemically related to inulin; the similarities in name do not relate to any similarity in form or function. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ...

Chemistry

Chemically, a precursor is a substance that, following a reaction, becomes an intrinsic part of a product chemical.

This is often heard when discussing methamphetamine production, as certain household items are precursors of the end product. It has been suggested that Desoxyn be merged into this article or section. ...

Medicine

Medically, symptoms that, following a certain progression, indicate the development of a different problem are also called precursors. Bold textItalic text // Headline text REDIRECT Insert text --70. ...

For example, chest pain can be a precursor to a heart attack. A heart attack involves chest pains, but not all chest pains indicate a heart attack. Chest of a human male The chest is a part of the anatomy of humans and various other animals. ... A myocardial infarction occurs when an atherosclerotic plaque slowly builds up in the inner lining of a coronary artery and then suddenly ruptures, totally occluding the artery and preventing blood flow downstream. ...