Biology 1002B Lecture Notes - Lecture 2: Ribonuclease, Uracil, Hydrolysis
Document Summary
Important point: simply able to evolve doesn"t means the subject under study is a living thing. (e. g. Virus evolve too, but it is not a living thing) Three domains from a common ancestor (luca; 3. 5-3. 8 billion years ago) Stromatolites (3. 5 billion year ago); build by cyanobacteria, which dated all the way to. Can one make organic molecules from inorganic molecules: miller urey experiment. Early atmosphere is considered as reducing atmosphere; there is no oxygen, oxygen is oxidizing gas. In order to build molecules, you need to add electrons and atoms, this makes the condition of the atmosphere by reducing; having oxygen in early time prevent biological molecules from been synthesized. Biological molecules like amino acids, nucleotides are highly reduced. In miller urey experiment, all biological molecules are produced after a week. In miller urey experiment produce only monomers, not polymers: chirality. Same chemical physical properties but different biological properties. (e. g.
