Biology 1002B Lecture Notes - Lecture 2: Abiogenesis, Reducing Atmosphere, Congenital Disorder
12 Jan 2017
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Document Summary
3 domains of life all descended from one luca. We think luca was about 3. 5 ~ 3. 8 billion years ago. 4. 6 billion years ago, solar system developed (rmb this number). 4 billion years ago, is when life started. In comparison, life evolved relatively fast (only took 0. 6 billion years) Modern day stromatolites are built by cyanobacteria"s microbial metabolism. What do we need for life: abiotic synthesis (non biological, ex: sugars, aa"s, nucleotides the building blocks of life must be present for the synthesis of life) !1: heritable information (a cell is useless if its information cannot get transferred to. 3. formation of cells: metabolism (required for energy transformation) Can organic molecules be made from inorganic molecules? (note: organic molecules are the basis of life) 2 enantiomers would have the same chemical & physical properties, but vastly different biological properties. We only use one form of enantiomer. All life only uses l amino acids, and d sugars.
