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AP Biology - Energy & Enzymes Flashcards

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9783160040catabolic pathwaysSeries of reactions that release energy by breaking down complex molecules into simpler compounds.0
9783160041anabolic pathwaysSeries of reactions that consume energy to build complicated molecules from simpler ones.1
9783160045potential energyStored energy.2
9783160050endergonic reactionReaction that absorbs free energy from its surroundings.3
9783160051exergonic reactionReaction that proceeds with a net release of free energy.4
9783160054phosphorylationThe metabolic process of introducing a phosphate group into an organic molecule.5
9783160056enzymeProtein that speeds up reactions. Typically end in "ase" (ex. Peroxidase, Lipase)6
9783160057activation energyThe amount of energy needed to push the reactants over an energy barrier.7
9783160058enzyme-substrate complexWhen an enzyme binds to its substrate, it forms:8
9783160059active siteA pocket or groove on the surface of the enzyme where a substrate can bind.9
9783160060induced fit modelStates that the enzyme and substrate undergo conformational changes to interact fully with one another (as opposed to "Lock & Key"10
9783160061cofactorInorganic 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. Iron is an example.11
9783160062coenzymeNon-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. Most vitamins function this way.12
9783160065feedback 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.13
9783160066saturated enzymeDescribes an enzyme's maximum activity when every active site is being used.14
9783160067Chemical EnergyPotential energy trapped in molecular bonds.15
9783160072Competitive inhibitionsubstance that resembles the normal substrate competes with the substrate for the active site which can be overcome by adding more substrate16
9783160073Noncompetitive inhibitora chemical that binds to an enzyme but not in the active site. This chemical will change the shape of the enzyme so substrate can no longer fit active site17
9783160074substratethe substance an enzyme catalyzes, changes.18
9783160075exothermic reactiona chemical reaction where energy is given off, so that the products have less energy than the reactants.19
9783160076endothermic reactiona chemical reaction where energy is taken in, so that the products have more energy than the reactants.20
9783160086DenatureCharacteristic of proteins; a change in shape that stops the protein from functioning.21
9783160087Allosteric__________ regulation of enzyme occurs when a molecule binds to an enzyme changing the protein's shape22
9783160097Protein Kinasesenzymes that reversibly activate or inactivate other proteins by adding phosphate groups to (phosphorylating) them23
9783160098pHAfter looking at the graph the enzyme activity of the the three different enzymes is being regulated by what variable24
9783160099TemperatureAfter looking at the shape of graph the enzyme activity of this enzymes is being regulated by what variable:25
9783160101MetabolismThe totality of an organism's chemical reaction26

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