Basic characteristics of life reproduction metabolism So 1 st cells would have

Basic characteristics of life reproduction metabolism

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Basic characteristics of life : reproduction & metabolism: So 1 st cells would have had to be able to reproduce which would have required them to have a source of nitrogenous bases, sugars, phosphate groups Now complex enzymes make this all happen
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Vesicles as 1 st step? When lipids & other organic molecules added to water vesicles spontaneously form lipid bilayer (separation of hydrophilic & hydrophobic molecules) These abiotically produced vesicles “reproduce” and grow on their own. Clay, like from early Earth will be absorbed into the vesicles some vesicles demonstrate semi- permeability
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Self-Replicating RNA RNA (when folded)can act as enzyme RNA catalysts called : ribozymes Some can make complimentary strands of short pieces of RNA mutations more stable &/or successful
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Ribozyme Once self- replicating RNA possible much easier for further changes to happen. Once double- stranded DNA appeared it would have been more stable so RNA left with role we see today
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  • Fall '16
  • idk
  • Abiogenesis, Miller & Urey

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