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AP Biology - Energy & Enzymes Flashcards

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5406059814metabolismThe sum of the building & breaking reactions occurring in cells0
5406059815catabolic pathwaysSeries of reactions that release energy by breaking down complex molecules into simpler compounds.1
5406059816anabolic pathwaysSeries of reactions that consume energy to build complicated molecules from simpler ones.2
5406059817bioenergeneticsThe study of how organisms manage their energy resources.3
5406059818kinetic energyEnergy associated with relative motion of objects.4
5406059819thermal energyKinetic energy associated with the random movement of molecules or atoms. (heat)5
5406059820potential energyStored energy.6
5406059821first law of thermodynamicsEnergy can be transferred and transformed, but it cannot be created or destroyed.7
5406059822entropyA measure of disorder or randomness. Tends to increase in the universe.8
5406059823second law of thermodynamicsEvery energy transfer or transformation increases the entropy of the universe.9
5406059824free 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
5406059825endergonic reactionReaction that absorbs free energy from its surroundings.11
5406059826exergonic reactionReaction that proceeds with a net release of free energy.12
5406059827energy couplingThe use of an exergonic process to drive an endergonic one.13
5406059828ATP (adenosine triphosphate)Composed of a sugar ribose, nitrogenous base adenine, and a chain of three phosphate groups bonded to it.14
5406059829phosphorylationThe metabolic process of introducing a phosphate group into an organic molecule.15
5406059830catalystA chemical agent that speeds up a reaction without being consumed by the reaction.16
5406059831enzymeProtein that speeds up reactions. Typically end in "ase" (ex. Peroxidase, Lipase)17
5406059832activation energyThe amount of energy needed to push the reactants over an energy barrier.18
5406059833enzyme-substrate complexWhen an enzyme binds to its substrate, it forms:19
5406059834active siteA pocket or groove on the surface of the enzyme where a substrate can bind.20
5406059835induced fit modelStates that the enzyme and substrate undergo conformational changes to interact fully with one another (as opposed to "Lock & Key"21
5406059836cofactorInorganic 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
5406059837coenzymeNon-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
5406059838competitive inhibitorsReduce the productivity of enzymes by blocking substrates from entering active sites.24
5406059839noncompetitive inhibitorsImpede enzymatic reactions by binding to another part of the enzyme (other than the active site).25
5406059842feedback 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
5406059855saturated enzymeDescribes an enzyme's maximum activity when every active site is being used.27
5406088554substrateThe reactant that an enzyme binds with to form product.28
5406108016Chemical EnergyPotential energy trapped in molecular bonds.29
5406115315Spontaneous 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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