BIOL 1202 : Biology Notes Test 1
Document Summary
Never found life; even after years of trial. 4 billion years ago: miracle, living species showed up. After earth was created, took millions of years to create life. Few centuries ago: people thought new living things appeared all of the time. Mid 1800"s louis pasteur: proved spontaneous generation was not correct. Cell theory- states that existing cells come from pre existing cells on the planet. Used broth in a flask to prove spontaneous generation of life does not occur. When neck is then removed, starts to grow again. Kranks equation-trying to prove life is in other places. Now: dna rna protein: need proteins to synthesize more dna, rna came first, simplest explanation. So how did the earliest cells do it: ribozymes: rna molecule that can catalyze reactions; especially when synthesizing rna itself, conclusion: earliest cells used rna to store info, ribozymes to catalyze rxns. Prebiotic soup: amino acids, nucleotides, lipids, sugars .
