BCH 3025 Lecture Notes - Lecture 5: Enzyme, Gene Duplication, Aerobic Organism
19 Jan 2017
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Chapter 1. 5: formation of self-replicating molecules was a key step. Gene duplication and mutation: gene duplication and mutation is one path to generate new enzymatic activities, mutations may allow for new functions better protein/organisms. Survival of the fittest under selective pressure (natural selection) Abiotic production of biomolecules: milley and urey experiments (1953) After subjection of the gaseous contents of the system to electrical sparks, products were collected by condensation amino acids were among the products. Compounds were created by the effects of powerful atmospheric forces and superheated inorganic solutes in the thermal vents of the ocean: uv radiation, lightning, volcanic eruptions. Rna can act as both the information carrier and biocatalyst: the fact that it can act as a catalyst suggests that rna (or similar molecule) may have been the 1st gene and the 1st catalyst. Landmarks in the evolution of life on earth: atmosphere of earth in the earliest stages had almost no oxygen.
