BIOL 2160 Chapter : Chapter 3 Cell Metabolism New
Document Summary
Types of metabolic reactions: chemical reactions, hydrolysis and condensation, phosphorylation and dephosphorylation, oxidation-reduction. Chemical reactions: reactants (or substrates) products, a + b c + d, direction of reaction, forward, reverse. Oxidation-reduction reactions: oil rig: oxidation is loss, oxidation: removal of electrons (or h+, c6h12o6+6o2- 6co2+6h2o, reduction is gain, reduction: addition of electroms or (h+, a+b+2h ha+ba, 2h+ + 2e. First law of thermodynamics: energy in the universe (closed system) is constant, human body is an open system, energy can be neither created nor destroyed. Energy changes in reactions: energy exchanged in all reactions, molecules possess energy, change in energy of a reaction = e, e = eproducts ereactants. If energy in reactants > energy in products: energy is released, downhill, reactants products + energy, e is negative. If energy in reactants < energy in products: energy input required, uphill, reactants + energy products, e is positive, eat sugar pops, e is.
