MMG 301 1st Edition Lecture 5Outline of Last Lecture I. Phylogenic treesII. taxonomyOutline of Current Lecture II. Energy yielding processesIII. ATP productionIV. Free energyV. Catalysis VI. Redox reactionsCurrent Lecture-major energy yielding processes in biology (all use oxidation-reduction processes)-1. Fermentation-electron donor: growth substrate (organic compound)-electron acceptor: organic molecule produced by the cell-ATP production: substrate level phosphorylation-does no consume oxygen-2. Respiration-electron donor: organic or inorganic compound-electron acceptor: exogenous (outside the cell) organic or inorganic compound-ATP production: proton motive force-3. Photosynthesis-electron donor: H20 (if oxygenic), another inorganic compound (if anoxygenic)-electron acceptor: CO2 or organic molecule -ATP production: proton motive force generated by light-strategies for producing ATP-substrate level phosphorylation-oxidative phosphorylation-free energy of formation in biological processes-free energy of a reaction: energy released that is available to do work (Gibb’s free energy, G)-deltaG = sum of deltaG (products) - sum of deltaG (reactants)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-exergonic: negative deltaG; energy yielding reactions-endergonic: positive deltaG; energy consuming reactions-catalysis and enzymes-activation energy: energy required to bring the molecules in a reaction to the reactive state-catalyst: substance that increases the rate of the reaction by lowering the activation energy-enzyme: biological catalyst; protein or RNA-redox reactions: provide energy for cell growth -oxidation: loss of an electron from an atom or a molecule-reduction: gain of an electron from an atom or a
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