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AP Bio Chapter 8 Flashcards

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5561419033MetabolismSum of all chemical processes0
5561419034Catabolic pathwaysBreak down molecules into simpler molecules; release energy1
5561419035Anabolic pathwaysConsume energy to build complex molecules from simpler ones2
5561419036ThermodynamicsStudy of energy transformation3
5561419037Law of Conservation of EnergyStates energy can't be created or destroyed4
5561419038Law of EntropyEvery energy transfer tends towards greater entropy5
5561419039EntropyAmount of disorder, randomness6
5561419040Spontaneous changeCan occur without outside help, can be harnessed to do work, increases stability7
5561419041Potential energyStored energy8
5561419042Kinetic energyEnergy of motion9
5561419043Free energyPortion of a system's energy that can perform work10
5561419044Equation for free energydG=dH-TdS (d=delta)11
5561419045Chemical equillibriumWhen the products and reactants in the concentration don't change12
5561419046EndergonicAbsorbs energy, dG is negative, not spontaneous Ex. photosynthesis13
5561419047ExergonicReleases energy, dG is positive, spontaneous Ex. cell respiration14
5561419048Structure of ATPMade of adenine, ribose, and triphosphate group15
5561419049Function of ATPExergonic reaction is coupled with an endergonic reaction through the use of a phosphorylated intermediate16
5561419050Activation energyEnergy needed to start a chemical reaction (break bonds before new ones can be made)17
5561419051Enzyme functionProteins which speed chemical reaction (catalysts), names usually end in -ase, lower activation energy (Ea)18
5561419052Enzyme structureCan bind or break apart19
5561419053Competitive inhibitorsMolecules that bind to the active site so the substrate can't20
5561419054Noncompetitive inhibitorsMolecules that bind to different part of the enzyme, causing the active site to change shape rendering it ineffective21
5561419055DenaturationProtein unravels and loses its proper confirmation in the quaternary structure, no longer works. Caused by change in temperature or pH22
5561419056Allosteric RegulationAllosteric site: area on an enzyme away from the active site to which an activator or inhibitor may bind; changes shape and activity of the active site23
5561419057Feedback inhibitionSwitching off a metabolic pathway by its end product which often acts as an allosteric inhibitor24
5561419058Enzyme cooperativityOccurs when an enzyme is made of 2 or more polypeptide chains, each with its own active site25
5561419059CofactorNonprotein helpers that some enzymes require, inorganic/organic26
5561419060CoenzymeAnother name for organic enzymes, usually vitamins27
5561419061Metabolic disequillibriumReactions in living systems can't reach equillibrium or dG would be 0 and it would die28

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