BIOL 201 Lecture Notes - Lecture 20: Cellular Respiration

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27 Feb 2018
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Energy transfer concepts & the role of atp. Equilibrium the point at which the rate of forward and reverse reactions are equal (reaction rates are kept constant) No energy is required to maintain this state. A point when [reactants] and [products] are kept constant. In isolated reactions (i. e. test-tubes), steady state = equilibrium. In open systems (e. g. cells), steady-state equilibrium. Other reactions are used to maintain constant concentrations that do not sit at equilibrium. Steady-state can be maintained at a point away from equilibrium, and the reaction can then be used to do work for the cell. Note: the only time living systems are at equilibrium is when they are dead . Concentrations of reactants and products for each reaction are maintained in steady-state , by connecting the reactions together in a cascade". Open systems " such as this are the basis for much of cellular function.

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