Metabolism Chapter - Chemical Equilibrium when cells reach equilibrium tha delta G is 0 no net change the cell will reach equilibrium when it dies

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Chemical Equilibrium : when cells reach equilibrium tha delta G is 0, no net change, the cell will reach equilibrium when it dies, it doesn’t want this, wants to keep them away from equilibrium. How many products for every substrate left at equilibrium, that’s the equilibrium constant. Reactant used by enzyme is substrate. Reactions are converted into products. Class question : make a table, analogy: 6 apples to make apple juice, have ten apples, think about juice as product, and how many apples left. Starting with x and have y it’ll be x-y, so it’ll be x over x-y. Point is to understand how an enzyme is working and how effective it is. How much product for reactant left. The product always comes from reactant, when its made you don’t have same amount of reactant left. ATP : Hydrolysis : Exergonic. spontaneous reaction when bonds break it needs water. Need water molecule to break down. It’ll then become inorganic phosphate, with negative charge from oxygen or hydrogen, pick up OH-. The negative charges makes it exergonic reaction. Chemical bonds when bonds are broken energy is consumer when bonds formed energy is released. When ATP is broken were releasing free energy, different from potential energy. In vitro outside the cell at -7.3 kcal/mol. Every muscle cell uses 10 million ATP per second. Energy coupling : Endergonic you need to put in energy, a little more than what it takes, not equal. It’s positive not going to happen, cell makes it two step process, and then phosphate comes off. Takes one step process and turns it into two step process. Class Question : Which of the following reaction will need ATP energy coupling to become spontaneous. A. +5.5 kcal/mol, needs ATP hydrolysis which is -7.3 which is just a bit more than it needs. Enzymes : Mostly proteins 99.9%, although same are made of RNA but not likely. Focus on enzymes that are proteins. Biological catalysts, catalyst is speeds up reaction, lowers activation energy converts substrate to product but doesn’t get used up in reaction, the substrate does. Proteins utilize amino acids in their active sites to make temporary bonds to their substrate and catalyze the reaction. Class Question : which of the following does not contain enzyme? a.perspiration: dead skin cells release enzyme
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This note was uploaded on 03/19/2008 for the course HDF 315L taught by Professor Anderson during the Fall '08 term at University of Texas at Austin.

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Metabolism Chapter - Chemical Equilibrium when cells reach equilibrium tha delta G is 0 no net change the cell will reach equilibrium when it dies

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