BCH 3025 Lecture Notes - Lecture 3: Endergonic Reaction, Metabolite, Thermodynamics
18 Jan 2017
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Document Summary
Give a constancy of concentration of the system: laws of thermodynamics. In any physical or chemical change, the total amt of energy in the universe remains constant forms of energy may change. The total entropy of the universe is continually increasing: cells can interconvert energy with efficiency. Atp: chemical currency of energy: removing terminal phosphoryl groups is highly exergonic. It is coupled with endergonic rxns to yield a -deltag: nearly all organisms derive their energy from sunlight (indirect or direct, nonphotosynthetic organisms obtain energy by oxidizing products of photosynthesis. Form co2, water, other end products that are released back into environment. All rxns involved in e- flow are redox rxns. Ger: free energy must be applied to the cell to synthesize macromolecules. Deltag will give a spontaneous process free energy is released in the process. Cell function needs proteins and nucleic acids (free energy formation is positive) molecules are less stable and more highly ordered than their monomeric components.
