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Origin of Life

Origin of Life. K. Sathasivan. Are we alone?. Yes No. How do you think life originated on earth?. Extraterrestrial aliens brought it Came with meteors from other planets Some superhuman powers created it Chemical from primordial soup combined to make life None of the above.

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Origin of Life

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  1. Origin of Life K. Sathasivan

  2. Are we alone? • Yes • No

  3. How do you think life originated on earth? • Extraterrestrial aliens brought it • Came with meteors from other planets • Some superhuman powers created it • Chemical from primordial soup combined to make life • None of the above

  4. History of Life

  5. Stromatolites

  6. Early prokaryotes

  7. Cyanobacteria fossils

  8. Possible Sources of Life’s Origin

  9. Possible Steps in the Origin of Life Protobionts and Liposomes

  10. Which came first? • DNA • RNA • Protein • Carbohydrates • Lipids DNA  RNA  PROTEIN (Genetic (Information (Catalytic and Information) and catalytic) Structural)

  11. Abiotic RNA Replication

  12. Primitive RNA and Proteins

  13. Which of the following is/are testable hypothesis about origin of life on earth? • Extraterrestrial aliens brought it • Came with meteors from other planets • Some superhuman powers created it • Chemical from primordial soup combined to make life • None of the above

  14. The Five Kingdom System

  15. Domain Systems

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