BIOL 201 Lecture : BIOL 201 Lecture 1-25.doc
Document Summary
Metabolism: several pathways that use small fundamental components to build larger macromolecules required for cellular processes: uses same macromolecules to break down and provide energy, governed by specific enzymes. Glucose>pyruvate and small molecules> exergonic (catabolic) reaction producing atp: uses atp to build important components (anabolic) Energy ability to carry out mechanical work active transport of small molecules and ions: generate macromolecules and building blocks. Energy: ability to do work: kinetic and potential, potential: o o o chemical bonds concentration gradients charge separations across membranes energy can be converted from one form to another. Equilibrium: rate forwards = rate reverse k_1[a][b] = k_2[c][d: products/reactants = k1/k2 = k_eq. Free energy or g: reaction proceeds only if g<0, g>0, reaction from right to left, g = 0 , equilibrium. Rate of reaction depends on reactants involved so we must know characteristics of reactants. As reaction proceeds, concentrations of a decreases as concentratoin of b is formed.