Biology notes on cell metabolism.

*Metabolism:Term used to describe chemical reactions in a cell. *Reactants:Chemicals that react with each other. *Products:Chemicals produced at the end of a chemical reaction. *Anabolic reaction:Reactions that involve the building up of complex molecules from s knaveler molecules. Enery is required. e.g photosynthesis*Catabolic reaction: Reactions where complex molecules argon imp everywhereished down into simpler molecules. These reactions realease energy.e.g respiration*Enzymes: Catalysts(proteins) which speed up chemical reactions without getting envolved in them. -enzymes control metabolic reactions. -They atomic number 18 proteins. -Proteins are do up of long chains of amino acids, that fold all over and take up a peculiar(prenominal) shape. -Enzymes will moreover work if they have the correct shape to allow them to practice session properly. *substrate:Substance an enzyme reacts with. ^^pH^^-Tends to change the shape of the enzyme and exposed the rate an enzyme w ill carry out its function. -Enzymes will simply have its correct shape at a specific pH. -The enzyme becomes less efficent on the other side of the pH. ^^Temperature^^-At low temporary workeroraryoraryorary thespian cell contents become solid, so enzymes cannot work. -As temp increases so does rate of reaction because the substrate and enzyme get more energy. -The temp that an enzyme works beast at is its optimum temp. -above optimum temp enzymes denature and rate of reaction drops. __________________________________*Immobilised Enzymes: Enzymes that are attached to eachother or an inert material.

Advantages of immobilised enzymes-Can recover enzymes easily- Enzymes can be reused-eff iency of enzymes is not subnormal*Bioreact! or-Large tank containing enzymes in an immobilised form used in industrial processes. ________________________________________*Active office- The part of the enzyme taht combines with the substrate. Active Site Theory1.The substrate combines wih the fighting(a) site of the enzyme. 2.The active site is induced slightly to draw in a better fit for the substrate. 3.The bonds in the substrate are altered so the substrate changes into the products. 4.Products leave... If you want to get a full essay, order it on our website: OrderEssay.net

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