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AP Biology Chapter 8 Metabolism Flashcards

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7599614212Metabolismthe totality of an organisms chemical reactions that result from interactions between molecules within the cell0
7599614213metabolic pathwaya sequence of chemical reactions undergone by a compound in a living organism, start with substrate end with product1
7599614214catabolicbreaking a complex molecule down into its simpler parts, releasing energy. ie. cellular respiration2
7599614215anabolicusing energy to build complex molecules from simpler molecules. ie. protein synthesis3
7599614216Bioenergeticsthe study of how organisms manage their energy resources4
7599614217energycapacity to cause change, do work5
7599614218kinetic energyenergy of motion6
7599614219heat(thermal energy)kinetic energy associated with random movement of molecules7
7599614220potential energyenergy of position8
7599614221chemical energypotential energy available for release in a chemical reaction, energy within bonds9
7599614222thermodynamicsstudy of energy transformations10
7599614223closed systemisolated from surroundings, no energy transfer, cant work at equilibrium bc its exhausted its ability to do work. free energy at a min11
7599614224open systemnot isolated, energy and matter can be transferred between system and surroundings, ie. cells12
75996142251st law of thermodynamicsenergy of the universe is constant, cannot be created or destroyed, can only be transferred or transformed, conservation of energy13
75996142262nd law of thermodynamicsduring every energy transfer, some energy is unusable and often lost, every energy transfer or transformation increases the total entropy of the universe14
7599614227entropydisorder, randomness15
7599614228free energydelta G, energy that can do work when temperature and pressure are constant, related to change in enthalpy(delta H), change in entropy(delta S) and temperature in Kelvin(T). delta G = delta H - T delta S16
7599614229exergonic reactiona reaction with a net release of free energy, negative free energy, spontaneous17
7599614230endergonic reactiona reaction that absorbs free energy from its surroundings, non-spontaneous, positive free energy18
7599614231coupled reactionsthe use of exergonic processes to drive endergonic ones, the energy given off from the exergonic is absorbed by the endergonic19
7599614232ATPadenosine triphosphate, composed of ribose (5 carbon sugar), adenine (nitrogenous base), and 3 phosphate groups. Phosphate tail can be broken through hydrolysis to produce energy, ADP, and an inorganic phosphate20
7599614233phosphorylationhow ATP drives endergonic reactions, covalently bonding a phosphate with another molecule, such as as reactant21
7599614234catalysta chemical agent that speeds up chemical reactions without being consumed by the reaction22
7599614235enzymesa catalytic protein, speeds up metabolic reactions by lowering activation energy, very specific, reusable, unchanged by reaction23
7599614236activation energyinitial energy needed to start a chemical reaction, free energy for activating reaction, given off by heat24
7599614237induced fitbrings the chemical groups of the active site into positions that enhance their ability to catalyze the reaction, makes the enzyme more effective25
7599614238cooperativityanother type of allosteric activation, binds to one active site but locks ALL active sites open, allowing products to be constantly produced26
7599614239Substratethe REACTANT that an enzyme acts on27
7599614240Enzyme-Substrate Complexenzyme and substrate28
7599614241Active Siteregion on the enzyme where substrate binds29
7599614242Hydrogen and Ionic Bondssubstrate held in active site by WEAK interactions30
7599614243Lock and Keyactive site on enzyme fits substrate exactly31
7599614244If reaction doesnt need energy to start (exergonic)How do you know if a reaction is spontaneous?32
75996142453 kinds of cellular work done by ATPShuttle renewable and nonrenewable ENERGY, provide ENERGY for cellular functions, provide ENERGY for catabolic reactions33
7599614246Ways enzymes lower activation energycan do this by having a favorable environment, straining substrate molecules, orienting substrates correctly34
7599614247hydrolysishappens when phosphate leaves ATP to give energy to something else. This causes ATP to become ADP, produces water35
7599614248cofactorsnon-protein enzyme helpers ex. zinc, iron, copper36
7599614249coenzymesorganic enzyme helpers ex. vitamens37
7599614250Denatureabove a certain temp activity declines, protein unwinds38
7599614251Renaturecoils it back to normal after temp gets too high and the activity decreased39
7599614252Gene Regulationcell switches on or off the genes that code for specific enzymes40
7599614253Feedback inhibitionend product of a pathway that continues to produce product (positive) and then turns off (negative)41
7599614254negative feedback inhibitionaccumulation of end product slows the process that produces that amount -stop production42
7599614255positive feedback inhibitionend product speeds up production (less common)43
7599614256Allosteric Regulationcan accelerate or inhibit production and enzyme activity by attaching to another part of the protein. this changes the shape of the active site which inhibits substrates from bonding and producing more products44
7599614257Activatorone of the allosteric regulators, stabilizes and keeps active site open for production, wedges open45
7599614258Inhiibitorone of the allosteric regulators, doesnt allow active site to work or produce, wedges closed46
7599614259Competitive Inhibitorinhibitor that mimics original substrate by blocking the original substrate47
7599614260Noncompetetitive Inhibitorbind to another part of enzyme to change shape and block substrate from producing48
7599614261ways enzymes are affectsenvironment, pH, temp, salinity, chemicals that infuse enzyme, increase activity by increasing substrate concentration49
7599614262exergonicwhat reaction is spontaneous (-G)50
7599614263endergonicwhat reaction is not spontaneous (positive G)51

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