BIOL 1202 : Bio 1202 Exam 1
Document Summary
15 trillion cells make up the human body. 4 billion years ago is when life began. Louis pasteur 1800s = proved life did not spontaneously generate. Broth in flask is boiled to kill preexisting organisms. As broth cools condensing water collects, sealing the mouth of the flask. If neck is later broken off, outside air can carry microorganisms into broth. Cooling of the earth had to take place. Tried to recreate early earths atmosphere to try and create life. When they ran the experiment a bunch they started to see different compounds. Organic molecules appear after only a few days. *how to assemble a living thing: accumulation of organic molecules, catalyze reactions, reproduce from stored genetic information, separate the living thing from the outside environment. Ribozymes: rna molecule that can catalyze reactions, especially those involved in synthesis and processing of rna itself, conclusion: earliest cells used rna to store info, ribozymes to catalyze rxns.
