BIOL 102 Chapter Notes - Chapter 8: Endergonic Reaction, Exergonic Reaction, Kinetic Energy
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10 Oct 2018
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Metabolism- total of all chemical reactions that occur in an organism. Direction- many cells use atp to drive reactions in one direction. Rate- catalysts called enzymes can speed up the rate. Entropy- a measure of the disorder that cannot be harnessed to do work. Free energy- (cid:373)easure of syste(cid:373)"s te(cid:374)de(cid:374)(cid:272)y to (cid:272)ha(cid:374)ge to a (cid:373)ore sta(cid:271)le state. Exergonic reaction- has release of energy and is spontaneous. Endergonic reaction- absorbs free energy from surroundings and is nonspontaneous. Energy coupling- using an exergonic reaction to drive an endergonic reaction. Mass action ratio- even if a reaction is uphill, you can drive a reaction in the unfavourable direction by manipulating the product: substrate ratio (exam) Catalyst- speed up the reaction without being consumed. Enzymes speed up reaction by lowering the activation energy of a reaction. Active site- where the reaction takes place. Substrate- reactant that binds to active site. Enzyme-substrate complex is formed when the enzyme and substrate bind.
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