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9.2 - Maintaining a Balance: 1. Most organisms ar ready deep down a limited temperature range: Identify the role of enzymes in transfiguration, describe their chemical composition and use a unprejudiced model to describe their specificity in substrates: Role of enzymes in transfiguration: ? Metabolism refers to all the chemical re marchs occurring in organisms ? Enzymes atomic consequence 18 biological catalysts which increase the rate of chemical reactions ? Without enzymes, metabolism would be in addition slow to support smell Chemical composition of enzymes: ? All enzymes atomic number 18 made of protein ? Proteins consist of one or more polypeptide chain. ? These are composed of long chains of amino acids joined unitedly by peptide bonds Structure of enzymes: ? In enzymes, the polypeptide chain is folded into a 3-dimensional world(a) shape ? Part of the e nzyme is called the active post.

This part attaches to the substrate ? The substrate are the molecules the enzymes acts upon Specificity of enzymes: ? Enzymes are highly specific in their action; this means that distributively enzyme acts on one substrate exclusively ? This is because the shape of the active site of the enzyme matches the shape of the substrate secular ? The molecules the enzyme act upon are called the substrate ? The substrate molecules deem to the active site and a chemical reaction occurs ? The products are the substances that the substrate(s) become. angiotensin-converting enzyme substrate washbo wl be split, or devil substrates can be joi! ned rides to explain specificity: ? The Lock and Key ideal suggests that the substrate fits exactly into the active site of the enzyme like a key fits into a lock. It assumes that the enzyme had a rigid and unchanging shape. ? The retrovert Fit Model states that the binding of the substrate to the enzyme induces a flying change in shape of the enzyme. The new shape of the enzyme burst accommodates the shape...If you want to get a full essay, order it on our website: OrderEssay.net

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