Practice question

Modern origin of life integrates chemical evolution from inorganic gases to organic monomers. Oparin and Haldane independently proposed reducing atmosphere rich in methane, ammonia, hydrogen and water vapor energized by lightning, ultraviolet radiation and volcanic heat. These conditions produced amino acids and nucleotides accumulating as hot dilute soup in oceans. Subsequent aggregation into coacervates and protobionts bridged chemogeny to biogeny, leading to anaerobic prokaryotes. This synthesis is recognized as Oparin–Haldane theory, unifying experimental support from Miller-Urey. This concept integrates genetics, ecology and molecular evidence, frequently tested in NEET, GATE and CSIR-NET, highlighting links between genotype,