Biology 1002B Lecture Notes - Lecture 2: Morning Sickness, Hydrolysis, Ribosomal Rna
15 Apr 2017
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If you can"t define life, then how do we know when life started and what is life and what isn"t. 3. 5/3. 8 billion years ago when luca was around. 4. 6 billion years old (the solar system) life evolved very fast. Geological formations in australlia (stromatolites) have been dated back to 3. 5bya which are the only evidence . No fossil record that goes back this far. Oxygen is good today but it was bad back then. Miller-urey experiment produces amino acids but not proteins because amino acids weren"t linked together which means it produces monomers not polymers. Same chemical and physical properties but vastly different biological properties. Thalidomide was a drug developped in europe in 1950s. Developped for preganant women who had morning sickness. Homochirality is essential to the evolution of life. We only use one form of each element, we don"t use both. Rna: the molecule that can do it all.
