A molecule that slows down the rate of an enzyme catalyzed reaction by changing the shape of the enzymes active site. The non-competitive inhibitor does this by attaching to another site on the enzyme.
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Enzymes are biological catalysts. There are optimum temperatures and pH pH: Scale of acidity/alkalinity. pH below 7 = acidic, pH above 7 = alkaline values at which their activity is greatest. Enzymes are also proteins, and usually denatured above about 45ºC. Enzymes are important in respiration.
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1.Nerve gases used in war bind to active sites which are needed for nerves to work and thus cause paralysis. 2. Lead and Mercury ions (heavy metals) cause denaturation of the enzymes in the human body and thus lower reaction rate. These heavy metals can be found in our food chain (eg. in tuna). •.
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Pepsin functions in the stomach to where pH is low (acidic) due to the presence of the acid HCl. Trypsin functions in the small intestine where pH is basic (around 8).
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Enzymes are biological catalysts-catalysts are substances that increase the rate of chemical reactions without being used up. Enzymes are also proteins proteins: organic compounds made up of amino acid molecules.
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An enzyme's optimum pH is the pH (that is, degree of acidity of alkalinity) that the enzyme catalyses reactions fastest at. If the pH varies too much from the optimum, the enz … yme becomes denatured and cannot catalyse reactions any more. 1 person found this useful.
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Optimum. Definition. noun. The best, the most favorable, the most suitable, or the most advantageous condition or result. Supplement. The word optimum in biology is often used to denote to a condition or a result that is favourable or best for a particular living entity. For instance, the term optimum pH refers to the pH resulting in maximal activity of a particular enzyme. Differing pH levels affect the shape of an enzyme.
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The optimum pH and optimum temperatures of an enzyme are simply levels that the enzyme work most effectively at. These levels contribute to factors such as the enzyme's protein structure. Different levels of pH and temperature can alter the integrity of the protein, this process is called denaturation.
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Each enzyme has an optimal pH at which the enzyme works best. Enzymes in the intestine for instance work best at pH of 7.5 (therefore, the optimum pH). The enzymes in the stomach have a different optimum pH though. The enzymatic activity in the stomach is best at pH of about 2.
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If the enzyme concentration is increased the reaction rate is also increased because there are more active sites for the substrate to attach. Eventually the reaction rate reaches a maximum because all of the substrate is saturated with enzyme and there is no more substrate available. •.
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what does optimum ph mean for an enzyme
The optimum PH mean for an enzyme are simply levels that the enzyme work most effectively at.