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AP Bio: Chapter 8 Flashcards

metabolism

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8175016518metabolismtotality of an organism's chemical reactions0
8175016519metabolic pathwaybegins with specific molecule, ends with product; each step is catalyzed by a specific enzyme1
8175018622catabolic pathwayrelease energy by breaking down complex molecules into simpler compounds2
8175018623anabolic pathwayconsume energy to build complex molecules from simpler ones3
8175022342bioenergenticsstudies how organisms use their energy4
8175022343energycapacity to cause change, some can perform work5
8175030762potential energyenergy because of position and structure6
8175025295kinetic energyenergy of movement7
8175025296heat (thermal energy)kinetic energy associated with random movement of atoms/molecules8
8175030763chemical energypotential energy released in a chemical reaction9
8175697796thermodynamicsstudy of energy transformations10
8175701371entropymeasure of disorder11
8175707791free energycan do work when temperature and pressure are uniform12
8175718338free energy formulachange in free energy (G) = change in total energy (H) - temperature in kelvin (T) x change in entropy (S) ΔG = ΔH - TΔS13
8175707792exergonicproceeds with net release of free energy, spontaneous14
8175707956endergonicabsorbs free energy, nonspontaneous15
8175759598energy couplingusing an exergonic process to drive an endergonic one16
8175761452phosphorylationmetabolic process of introducing a phosphate group into an organic molecule.17
8175761453catalystchemical agent that speeds up a reaction without being consumed by the reaction18
8175764431enzymecatalytic protein19
8175767674free energy of activation/ activation energy (Ea)initial energy needed to start a chemical reaction20
8175770383substratereactant enzyme acts on21
8175772142enzyme substrate complexa temporary complex formed when an enzyme binds to its substrate molecules22
8175772143active siteregion where substrate binds to an enzyme23
8175774714induced fitbinds chemical groups of active site into position to enhance their ability to catalyze reactions24
8175774715cofactorsnonprotein enzyme helpers25
8175774716coenzymean organic cofactor required for enzyme activity26
8175778457competitive inhibitorbinds to an active site, competes with the substrate27
8175778458noncompetitive inhibitorbinds to another part of an enzyme, makes the enzyme change shape and the active site less effective28
8175782123allosteric regulationeither inhibits/stimulates enzymes; occurs when regulatory molecule binds to a protein at one site and affects protein's function at another site29
8175788474cooperativityform of allosteric regulation that amplifies enzyme activity30
8175788475feedback inhibitionend product of metabolic pathway shuts down the pathway- prevents cell from wasting chemical resources31

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