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AP Bio Test 4 Flashcards

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15296203913define energythe ability to do work0
15296250874What is potential energy? (w example)energy that is stored ex-water behind a dam1
15296257790what is kinetic energy? (w example)energy of motion ex- releasing arrow from a bow2
15296277875what are the 6 specific types of energy?mechanical, light, heat, sound, electrical and chemical3
15296284983What is the first law of thermodynamics?Energy cannot be created or destroyed but can be transformed and transferred4
15296289062What is the second law of thermodynamics?entropy is constantly increasing in the universe AND energy transformation tend to go towards a state of more disorder but higher stability5
15296432083endergonic reactionReaction that absorbs free energy from its surroundings.6
15296439900exergonic reactionReaction that proceeds with a net release of free energy.7
15296452754what is the equations for calculating free energy?delta G= delta H- T delta S8
15296457474delta H is negativereactant has more energy and the reaction is exergonic9
15296463234delta H is positiveproduct has more energy and the reaction is endergonic10
15296469615delta G is positivenot spontaneous11
15296469617delta G is negativespontaneous12
15296474152delta S is positivemore disorder13
15296474153delta S is negativeless disorder14
152964843284 factors that affect entropystate of matter, particle size, temperature, number of particles15
15296518842endergonic reactions start with...poor reactants and rich products16
15296522544exergonic reactions start with....rich reactants and poor products17
15296529763what is enthalpy?the amount of energy stored in the products vs reactants. (H)18
15297156822what is energy coupling?the use of energy released from an exergonic reaction to drive an endergonic reaction ( has a positive delta G value and will not occur spontaneously)19
15297173890how does ATP play a role in energy coupling?the previous reaction combines with ATP hydrolysis; formation of ATP is an endergonic process20
15297203612how can an enzyme affect the rate of reaction?through a catalyst, it can speed up the chemical reaction and make the rate of reaction higher21
15297206760how can an enzyme affect the activation energy?enzymes lower the amount of activation energy needed to make reactants into products.22
15297447216enzymeA type of protein that speeds up a chemical reaction in a living thing23
15297449647substratereactant of an enzyme-catalyzed reaction24
15297451976active siteThe part of an enzyme where the chemical reaction occurs.25
15297454688productsEnding materials in a chemical reaction.26
15297461705competitive inhibitorcompetes with substrate for active site27
15297467185non-competitive inhibitoran inhibitor that binds to an enzyme at an allosteric site.28
15297479506cofactors (w examples)nonprotein enzyme helpers (small and non polar) Zn2+ Fe2+ Cu2+ Mg2+29
15297496101coenzymesorganic cofactors that aid enzyme actions coenzyme A and B vitamins NAD FAD30
15297519072enzyme in the old labcatalyst31
15297519073substrate in the old labH2O232
15297522395products in the old labO2 and H2O33
15297546987why did we use KMnO4 in the old lab?to figure out how much H2O2 was left in the beaker34
15297630049How does low temperature affect enzymes?enzyme and substrate don't collide as often so less product is formed35
15297633863How does high temperature affect enzymes?hydrogen bonds ae broken and the enzyme gets denatured36
15297647040how does a basic pH affect enzymes?hydrogen bonds interfered with shapes/changes and lots of (OH)- CAUSES SLOW OR NO REACTION37
15297655920how does a very acidic pH affect enzymes?lots of H+ and H+ interfere with hydrogen bonds changing the shape of the enzyme CAUSES SLOW OR NO REACTION38
15297668902what is the optimal pH for an enzyme?6-839
15297701038how do you calculate rate of reaction?Product 2- Product 1 / Time 2- Time 140
15297730664what is an allosteric site?a different location that is not the active site of enzyme catalysis - non-competitive inhibitors bind here41
15297744568what is allosteric regulation?when an enzymes functionality at the active site is affected by the binding of a regulatory molecule42
15297770569Why is feedback inhibition important?it prevents the cell from wasting resources by synthesizing more product than necessary43
15297788619what role do activators play in allosteric regulation? where does it bind?bind to the allosteric site of the enzyme and stables it in its active form44
15297800209what role do inhibitors play in allosteric regulation? where does it bind?binds to the allosteric site and stabilizes it in its inactive form45

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