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AP Biology - Energy & Enzymes Flashcards

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10852486208metabolismThe sum of the building & breaking reactions occurring in cells0
10852486209catabolic pathwaysSeries of reactions that release energy by breaking down complex molecules into simpler compounds.1
10852486210anabolic pathwaysSeries of reactions that consume energy to build complicated molecules from simpler ones.2
10852486211bioenergeneticsThe study of how organisms manage their energy resources.3
10852486212kinetic energyEnergy associated with relative motion of objects.4
10852486213thermal energyKinetic energy associated with the random movement of molecules or atoms. (heat)5
10852486214potential energyStored energy.6
10852486215first law of thermodynamicsEnergy can be transferred and transformed, but it cannot be created or destroyed.7
10852486216entropyA measure of disorder or randomness. Tends to increase in the universe.8
10852486217second law of thermodynamicsEvery energy transfer or transformation increases the entropy of the universe.9
10852486218free energyMeasures the portion of a system's energy that can perform work when temperature and pressure are uniform throughout the system, as in a living cell.10
10852486219endergonic reactionReaction that absorbs free energy from its surroundings.11
10852486220exergonic reactionReaction that proceeds with a net release of free energy.12
10852486221energy couplingThe use of an exergonic process to drive an endergonic one.13
10852486222ATP (adenosine triphosphate)Composed of a sugar ribose, nitrogenous base adenine, and a chain of three phosphate groups bonded to it.14
10852486223phosphorylationThe metabolic process of introducing a phosphate group into an organic molecule.15
10852486224catalystA chemical agent that speeds up a reaction without being consumed by the reaction.16
10852486225enzymeProtein that speeds up reactions. Typically end in "ase" (ex. Peroxidase, Lipase)17
10852486226activation energyThe amount of energy needed to push the reactants over an energy barrier.18
10852486227enzyme-substrate complexWhen an enzyme binds to its substrate, it forms:19
10852486228active siteA pocket or groove on the surface of the enzyme where a substrate can bind.20
10852486229induced fit modelStates that the enzyme and substrate undergo conformational changes to interact fully with one another (as opposed to "Lock & Key"21
10852486230cofactorInorganic metal ion helpers that may be bound tightly to the enzyme as a permanent resident, or may bind loosely and reversibly along with the substrate.22
10852486231coenzymeNon-protein Organic helpers that may be bound tightly to the enzyme as a permanent resident, or may bind loosely and reversibly along with the substrate.23
10852486232competitive inhibitorsReduce the productivity of enzymes by blocking substrates from entering active sites.24
10852486233noncompetitive inhibitorsImpede enzymatic reactions by binding to another part of the enzyme (other than the active site).25
10852486234feedback inhibition/negative feedbackA metabolic pathway is switched off by the inhibitory binding of its end product to an enzyme that acts early in the pathway.26
10852486235saturated enzymeDescribes an enzyme's maximum activity when every active site is being used.27
10852486236substrateThe reactant that an enzyme binds with to form product.28
10852486237Chemical EnergyPotential energy trapped in molecular bonds.29
10852486238Spontaneous ReactionWhen a reaction doesn't require energy to proceed it is said to be this - doesn't mean it will be FAST.30

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