Enzyme action and inhibition: active site, competitive inhibitors

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Enzyme-substrate complex:

The result of the binding to the active site some of the chemical bonds in the substrate molecules undergo changes . These changes lead to the formation of the product of the reaction

- enzymes are generally highly specific meaning that the enzyme catalyzes only one type of reaction important because it allows a cell to function in an orderly way and use its energy stores efficiently.

Competitive Inhibition:

inhibitor molecules = a molecule similar in structure to the substrate for a given enzyme that competes with the substance to bind to the enzyme's active site .Once the inhibitor molecule has bound to the active site the substrate cannot bind which causes the metabolic pathway to stop.

Non -Competitive Inhibition : change shape in enzyme so it can not bind to substrate which stops metabolic pathway .

***see diagram