BIS 2A Lecture Notes - Lecture 1: Exergonic Reaction, Reducing Atmosphere, Potential Energy
Document Summary
Cells then catalysts and replicable information got there somehow. Replication came first - catalytic rna,dna, metabolism and cell membrane. Source of energy - metabolism and catalysts. Single cells and (just a little) multicellularity. The 1st 2 elements (h and he) - 14 bya - universe. Because its still leaking out of the interior of the earth. High levels of oxygen led to high level of energy for earth. Life requires energy because we require an exergonic reaction to survive. Keeping a set of molecules in a particular structure (girl / horse) requires work. Living things reduce the entropy around the, to organise themselves. Eg. c3h8 + 5o2 -> 3co2 + 4h2o + heat and light. Potential energy (e you could harness to do work) Less particles/parts and more bonds mean lower potential energy hence more stable (high entropy then) Closed : heat and light passes but no molecules. Molecules are running in and out of a system all the time.
