According to Oparin, the atmosphere of primitive earth was reducing because H atoms were most numerous and most reactive. Large quantities of H2, N2, water vapour CO2,CH4 and NH3 were present, but free oxygen was not present in significant amount. Related Theory Oparin and Haldane suggested that life originated from non-living organic molecules like proteins and RNA. This was followed by the theory of chemical evolution which suggested that atmospheric conditions of earth led to the formation of organic molecules from inorganic molecules.
According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
NEET UG 2004 — Zoology Molecular Basis of Inheritance
2004mcqmedium
According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
Official previous-year question
Held on 30 Apr 2004 · Verified 9 Jul 2026.
Options
- A
methane
- B
oxygen
- C
hydrogen
- D
water vapour.
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