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HL Biology Notes for Enzymes & Metabolism The information in this entry covers the IB syllabus for topics 3.6, 3.7, 3.8, 7.6, 8.1 and 8.2. (&C) Enzymes Enzyme: a globular protein molecule that accelerates a proper(postnominal) chemical reply. Enzymes atomic number 18 biologic catalysts. Active Site: the region of an enzyme scrape that binds the substratum during the chemical reaction catalyzed by the enzyme. Substrate: the reactant(s) in an enzyme-catalyzed reaction Denaturation: a structural change in a protein that results in a redness of its biologic properties. The loss of function is commonly permanent. Exergonic & Endergonic Reactions Exergonic reactions are those in which the stark readiness of the final transmit is less than the free energy of the initial state. (-G) This represents energy that stool be used to do biological work. Endergonic reactions are those in which the free energy of the initial state is less than the free energy of the final state. (+G) Image from Image from hypertext transfer protocol://www.biology.arizona.edu/biochemistry/problem_sets/energy_e http://www.biology.arizona.edu/biochemistry/problem_sets/energy_e nzymes_catalysis/ art/16t.gif nzymes_catalysis/graphics/8ta.gif Enzymes increase the rate of exergonic reactions: Exergonic reactions befall spontaneously, only if do not necessarily occur quickly.

By arduous the activation energy of the reaction, enzymes allow more substrate to be converted into product. Enzymes increase the number of successful collisions amid reactant molecules. Image from http://www.bi ology.arizona.edu/biochemistry/problem_sets/! energy_enzymes_catalysis/graphics/q1ta.gif A. De Jong/TFSS 2011 1 of 25 HL Biology Notes for Enzymes & Metabolism Enzyme-Substrate Specificity single out 1 the Lock & Key Model Most enzymes are specific to a specific biochemical reaction. According to the scroll and trace model, this is due to the three-dimensional structure of the active commit which is complemental to its substrate like a...If you want to get a full essay, station it on our website: BestEssayCheap.com

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