BIOC 4403 Lecture Notes - Lecture 2: Protist, Ribosomal Rna, Transferase
4 Mar 2016
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4403 - 2 origins of genes and genomes. Study online at quizlet. com/_1yh5en: how do we know what we know about the early evolution of cellular life, comparative biology, relics, feasibility experiments, the rna world. Compare / contrast the properties of living beings, infer what the biology of the last universal common ancestor (luca) might have been like: Examine fossils (biological or chemical), or putatively primitive features of modern organisms: Fossilized stromatolites suggest cyanobacteria were around ~2. 7 bya! 2-methylhopanoids serve as membrane biomarkers for cyanobacterial oxygenic photosynthesis at around that time. Test hypotheses about the origin of life by demonstration of similar events in the lab. E. g. , miller-urey experiment of 1952: water + methane + ammonia + hydrogen + electricity = amino acids. All life that is known to exist on earth today and all life for which there is evidence in the geological record seems to be of the same form one based on dna genomes and protein enzymes.
