BIOL 201 Lecture Notes - Lecture 1: Rubber Band, Atp Hydrolysis, Chemical Energy
Document Summary
Energy in cell biology 1: the mechanics of energy. Higher gibbs free energy => higher energy quality. G = free energy = energy available to do work = total energy - unavailable energy. For isolated system, h = 0 since there"s no heat exchange with the environment. Standard free energies are additive: go is sum of elementary rxn steps (similar to hess"s law) The molecule is constantly being bombarded by neighboring molecules, there"s constant ke coming in to that molecule. For every collision, the molecule picks up a little bit of ke, hence the fluctuation in the energy of that molecule. Occasionally, the fluctuation (due to random collisions) causes the energy of a molecule to reach the transition state go (ea) System with low g* would have higher probability of the fluctuations reaching the g*. Enzymes lower the free energy of transition states. Every rxn is reversible; we say rxns are irreversible b/c sometimes their.
