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Oparin`s and Halden`s Theory (Biochemical origin of life)

Gradual transformation (transmutation) of inorganic compounds to organic compounds and organic compounds to proto cell (life) is called Biochemical origin of life.

Major steps:

1. Chemogeny:
   It is the process of gradual transformation of inorganic compounds to organic compounds. There are its Five sub-units:-
   1. Formation of water, methane, Ammonia and Cynamide.
   2. Formation of hydrocarbons.
   3. Formation of sugar, amino acids and fatty acids.
   4. Formation of oxy & hydroxyl derivatives of hydrocarbons.
   5. Formation of purines, pyrimidines and nucleotides.

    

2. Biogeny:
   Gradual transformation of organic compounds to protocell (life). 3 Steps are:-
   • Formation of nuclei acids.
   • Formation of co-acervates.
   • Formation of proto cell.

    

3. Cognogeny:
   Diversification of protozoa into metazoa and metaphyta and various characters.

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