BIOL 3210 Lecture Notes - Lecture 17: Photosynthesis, E Number, Thermodynamics
Document Summary
Bioenergenetic coupling: exergonic reactions (like atp hydrolysis) can be used to drive endergonic reaction as long as the summed g is negative. This is a really important idea, it will be on the next exam and the final exam. Use a reaction with a negative g to drive a reaction with a positive g. Redox reactions are always paired half reactions because in order for one atom/ molecule to be oxidized, another must be reduced. Can be described by: fe2+ fe3+ + e, cu2+ + e- cu+ The fe2+ is the electron donor and the fe3+ is the electron acceptor. Hydrogen lost bond to oxygen, so it is reduced. Photosynthesis | 6co2 + 6h20 + energy 6o2 + glucose. Any type of redox reaction is actually something that can be measured simply by voltage. It can all be quantified by using a voltmeter. Measures the affinity of a molecule/atom for electrons. More positive number, the higher it wants electrons.
