What does Oparin – Haldane hypothesis about the origin of life suggests.
According to Oparin and Haldane’s Biochemical hypothesis, the origin of life occurs in three stages. The first life form could have come from pre-existing, non-living organic molecules (such as the RNA, Proteins) and the formation of life was preceded by chemical evolution. This theory suggests that life arose gradually from inorganic molecules, with amino acids working as the building blocks. These then combine to make complex polymers that might get assembled into structures that were capable of sustaining and replicating themselves. Oparin considered these as colonies of proteins that clustered together to carry out metabolism, whereas, Haldane thought of them as macromolecules that were enclosed in membranes to build up cell-like structures.
