BIO 361 Lecture Notes - Lecture 12: Elementary Reaction, Rate Equation, Reaction Rate
27 Jun 2016
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Biochemistry professor sanford simon stony brook summer 2016. Reaction order indicates the number of molecules participating in an elementary reaction. A+b -> p is a second order or pseudo first order reaction (dependent either on the concentration of a or b) A rate equation describes the progress of a reaction as a function of time. We can describe the change in [a] as a function of time. Straight line for first order reaction t1/2 = time for half of the initial reactant to be converted to product t1/2 for first order reaction is independent of [a]o. The half-life for a second order reaction depends on the initial substrate concentration. Enzymes can be studied by measuring reaction velocities. When [sucrose] is >>> [enzyme] the reaction rate no longer increases as [sucrose] increases. Rate of product formation is a first order process. At low [s] k1 is the rate limiting step. At high [s] k2 is the rate limiting step.
