BI110 Chapter Notes - Chapter 73: Primitive Cell, Reducing Atmosphere, Macromolecule
Document Summary
Modules 73/74 origin and early evolution of life. The seven characteristics of life displays order harness and utilize energy reproduce respond to stimuli exhibit homeostasis growth and development. Is a virus alive? evolves, reproduces, has order can"t make own protein though (can"t respond to stimuli/maintain homeostasis) 4 major types of macromolecules for al forms of life nucleic acids proteins lipids carbohydrates all except lipids are polymers made up from simpler building blocks, and all are made within cells by complex metabolic pathways. Oparin-haldane hypothesis organic molecules that form building blocks of life could have been formed in conditions that prevailed on primitive earth. Reducing atmosphere that lacked oxygen atmosphere was dominated by h2s, co2, nh3, ch3, h2o (vapour) these conditions allowed for synthesis of complex organic molecules. Miller-urey experiment 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.
