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Lucy Lynn-Evans What is the importance of Metabolic Pathways? The chemical reactions that occur within organisms are collectively known as a metabolism. There are two subcategories of metabolism; anabolism, the building up of complex organic molecules from simpler precursors and the other is catabolism, the breakdown of complex substances into simpler molecules, often accompanied by the release of energy. The metabolism is organised by metabolic pathways. This is the transformation of one molecule into another, and then into another and another in sequence. A metabolic pathway is controlled by negative feedback which is extremely efficient as when enough of the product is made, the product inhibits the enzyme which causes the first transformation to occur, thus the pathway slows down or stops completely and the amount of product decreases. Each metabolic pathway is a series of reactions organised so the products of one reaction become the substrate of...

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