Biology 1002B Lecture Notes - Lecture 3: Antiemetic, Abiogenesis, Stromatolite
9 Apr 2016
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They have dna, proteins, they can evolve, but not alive. Earth 4. 6 billion years old stromatolites (fossils say 3. 5 billion years old) cyanobacteria (pushes it back they make stromatolites, so they must be older) But we don"t think cyanobacteria came first so Bacteria, archaea, eukaryotes all derived from one universal common ancestor luca. Dna to rna to protein transfer of info. What came before luca? there were many early forms of life that died out (ex. Didn"t have atp, or dna, etc. ) just one branch survived! Note: archaea is a branch off of the eukaryote branch. To be able to grow/reproduce in extreme environments extremophiles . Note: prokaryotes don"t exist no single group of organisms. Pro means anteriority suggests directionality: simple to complex. Chirality handedness two enantomers (optical isomers) same chemical and physical properties but can have vastly different biological properties! o. Thalidomide: antiemetic drug in 1950s and 1960s o. Comes in two chiral forms: teratogen = limb deficient.
