BI110 Lecture Notes - Lecture 10: Homeostasis, Cell Nucleus, Polymerization
Document Summary
Bi110-lecture 10-origins and early life of evolution (modules 73 and 74 cont"d) Although virus have the most characteristics of life (except producing homeostasis), viruses can exist and reproduce, so, viruses are alive. 150,000-200,000: earliest humans (12/31) and extinction of dinosaurs. All except lipids are polymers made up from simpler building blocks, and all are made within cells by complex metabolic pathways. Organic molecules that form building blocks of life could have been formed in conditions that prevailed on primitive earth. Reduced atmosphere that lacked oxygen (h2s, h2o (g), co2, ch4, Allows for synthesis of complex organic molecules. Simulated earth"s early conditions and created several organic molecules including amino acids. When hcn and ch2o were added, lipids, sugars and nucleotide components were generated too. Key macromolecules of life, such as proteins and nucleic acids, are polymers that were not formed in the miller-urey experiment. Polymerization reactions may have occurred on solid surfaces (ex. clay)
