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AP Biology Chapter 8 Flashcards

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15450530412Metabolismthe totality of an organisms chemical reactions that result from interactions between molecules within the cell0
15450530413metabolic pathwaya sequence of chemical reactions undergone by a compound in a living organism, start with substrate end with product1
15450530414Catabolismbreaking a complex molecule down into its simpler parts, releasing energy. ie. cellular respiration2
15450530415Anabolismusing energy to build complex molecules from simpler molecules. ie. protein synthesis3
15450530416Bioenergeticsthe study of how organisms manage their energy resources4
15450530417energycapacity to cause change, do work5
15450530418kinetic energyenergy of motion6
15450530419heat(thermal energy)kinetic energy associated with random movement of molecules7
15450530420potential energyenergy of position8
15450530421chemical energypotential energy available for release in a chemical reaction, energy within bonds9
15450530422thermodynamicsstudy of energy transformations10
15450530423closed systemisolated from surroundings, no energy transfer, cant work at equilibrium bc its exhausted its ability to do work. free energy at a min11
15450530424open systemnot isolated, energy and matter can be transferred between system and surroundings, ie. cells12
154505304251st law of thermodynamicsenergy of the universe is constant, cannot be created or destroyed, can only be transferred or transformed, conservation of energy13
154505304262nd 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
15450530427entropydisorder, randomness15
15450530428free 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
15450530429exergonic reactiona reaction with a net release of free energy, negative free energy, spontaneous17
15450530430endergonic reactiona reaction that absorbs free energy from its surroundings, non-spontaneous, positive free energy18
15450530431CouplingThe extent to which subsystems depend on each other.19
15450530432ATPadenosine 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
15450530433phosphorylationhow ATP drives endergonic reactions, covalently bonding a phosphate with another molecule, such as as reactant21
15450530434catalysta chemical agent that speeds up chemical reactions without being consumed by the reaction22
15450530435enzymesa catalytic protein, speeds up metabolic reactions by lowering activation energy, very specific, reusable, unchanged by reaction23
15450530436activation energyinitial energy needed to start a chemical reaction, free energy for activating reaction, given off by heat24
15450530437induced fitbrings the chemical groups of the active site into positions that enhance their ability to catalyze the reaction, makes the enzyme more effective25
15450530438cooperativityanother type of allosteric activation, binds to one active site but locks ALL active sites open, allowing products to be constantly produced26
15450530439Substratethe REACTANT that an enzyme acts on27
15450530440Enzyme-Substrate Complexenzyme and substrate28
15450530441Active Siteregion on the enzyme where substrate binds29
15450530442spontaneoushaving no external cause, acting on impulse30
15450530443Lock and Keyactive site on enzyme fits substrate exactly31
15450530444If reaction doesnt need energy to start (exergonic)How do you know if a reaction is spontaneous?32
154505304453 kinds of cellular work done by ATPShuttle renewable and nonrenewable ENERGY, provide ENERGY for cellular functions, provide ENERGY for catabolic reactions33
15450530446Ways enzymes lower activation energycan do this by having a favorable environment, straining substrate molecules, orienting substrates correctly34
15450530447hydrolysishappens when phosphate leaves ATP to give energy to something else. This causes ATP to become ADP, produces water35
15450530448cofactorsnon-protein enzyme helpers ex. zinc, iron, copper36
15450530449coenzymesorganic enzyme helpers ex. vitamens37
15450530450Denatureabove a certain temp activity declines, protein unwinds38
15450530451Renaturecoils it back to normal after temp gets too high and the activity decreased39
15450530452Gene Regulationcell switches on or off the genes that code for specific enzymes40
15450530453Feedback inhibitionend product of a pathway that continues to produce product (positive) and then turns off (negative)41
15450530454negative feedback inhibitionaccumulation of end product slows the process that produces that amount -stop production42
15450530455positive feedback inhibitionend product speeds up production (less common)43
15450530456Allosteric 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
15450530457Activatorone of the allosteric regulators, stabilizes and keeps active site open for production, wedges open45
15450530458Inhiibitorone of the allosteric regulators, doesnt allow active site to work or produce, wedges closed46
15450530459Competitive Inhibitorinhibitor that mimics original substrate by blocking the original substrate47
15450530460Noncompetetitive Inhibitorbind to another part of enzyme to change shape and block substrate from producing48
15450530461biosynthetic pathwaya multistep biochemical pathway that synthesizes an end product or compound49
15450530462exergonicwhat reaction is spontaneous (-G)50
15450530463endergonicwhat reaction is not spontaneous (positive G)51
15450530464ADP (adenosine diphosphate)Nucleotide with two phosphate groups that can accept another phosphate group and become ATP.52
15450530465EquilibriumThe tendency of an organism or a cell to regulate its internal conditions, usually by a system of feedback controls, so as to stabilize health and functioning, regardless of the outside changing conditions.53
15450530466ReactantsA starting material in a chemical reaction54
15450530467cellular respirationProcess that releases energy by breaking down glucose and other food molecules in the presence of oxygen55
15450530468Photosynthesisprocess by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches56
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