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AP Biology - Energy & Enzymes Flashcards

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9606884837metabolismThe sum of the building & breaking reactions occurring in cells0
9606884838catabolic pathwaysSeries of reactions that release energy by breaking down complex molecules into simpler compounds.1
9606884839anabolic pathwaysSeries of reactions that consume energy to build complicated molecules from simpler ones.2
9606884840bioenergeneticsThe study of how organisms manage their energy resources.3
9606884841kinetic energyEnergy associated with relative motion of objects.4
9606884842thermal energyKinetic energy associated with the random movement of molecules or atoms. (heat)5
9606884843potential energyStored energy.6
9606884844first law of thermodynamicsEnergy can be transferred and transformed, but it cannot be created or destroyed.7
9606884845entropyA measure of disorder or randomness. Tends to increase in the universe.8
9606884846second law of thermodynamicsEvery energy transfer or transformation increases the entropy of the universe.9
9606884847free 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
9606884848endergonic reactionReaction that absorbs free energy from its surroundings.11
9606884849exergonic reactionReaction that proceeds with a net release of free energy.12
9606884850energy couplingThe use of an exergonic process to drive an endergonic one.13
9606884851ATP (adenosine triphosphate)Composed of a sugar ribose, nitrogenous base adenine, and a chain of three phosphate groups bonded to it.14
9606884852phosphorylationThe metabolic process of introducing a phosphate group into an organic molecule.15
9606884853catalystA chemical agent that speeds up a reaction without being consumed by the reaction.16
9606884854enzymeProtein that speeds up reactions. Typically end in "ase" (ex. Peroxidase, Lipase)17
9606884855activation energyThe amount of energy needed to push the reactants over an energy barrier.18
9606884856enzyme-substrate complexWhen an enzyme binds to its substrate, it forms:19
9606884857active siteA pocket or groove on the surface of the enzyme where a substrate can bind.20
9606884858induced fit modelStates that the enzyme and substrate undergo conformational changes to interact fully with one another (as opposed to "Lock & Key"21
9606884859cofactorInorganic 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
9606884860coenzymeNon-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
9606884861competitive inhibitorsReduce the productivity of enzymes by blocking substrates from entering active sites.24
9606884862noncompetitive inhibitorsImpede enzymatic reactions by binding to another part of the enzyme (other than the active site).25
9606884863feedback 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
9606884864saturated enzymeDescribes an enzyme's maximum activity when every active site is being used.27
9606884865substrateThe reactant that an enzyme binds with to form product.28
9606884866Chemical EnergyPotential energy trapped in molecular bonds.29
9606884867Spontaneous 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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