Question

What was proposed by, Oparin and Haldane on origin of life? How did S.L. Miller's experiment support their proposal?

Answer 1

In 1992, JBS Haldane and Aleksandr Oparin independently proposed a theory about origin of life which said that organic molecules could be formed from abiogenic material in the presence of an external energy source.

Then in 1953, Harold C Urey and Stanley Miller tested the Oparin-Haldane theory and successfully produced organic molecules from some of the inorganic components thought to have been present on prebiotic Earth. They combined warm water with a mixture of four gases - water vapour, methane, ammonia and molecular hydrogen - and pulsed the "atmosphere" with electrical discharge.