He suggested that the giant molecules must have undergone various types of combination forming the complex masses, so called coacervates. The enzymes have developed before the cells. Gradually, the gene aggregates because surrounded by enzymes which formed the cytoplasm. These enzymes could have combined the nitrogen bases, simple sugar and phosphates in to the nucleotides. Nucleotides might have combined to form DNA and RNA. The nucleoproteins marked the beginning of life. Formation of nucleoproteins is the most important event in the origin of life. Some protein fatty acids organized around the coacervates to form the surface membrane.Some of it proteins differentiated in to enzymes. These processes must have culminated in the origin of ever first living cells. Many of the biologists do believe that life originated in sea. The first cell like structure were called eobionts or pre cell. Oparin called them Protobionts. These were perhaps similar to mycoplasma which gives rise to Monerans and protista. Monerans included prokaryotes like bacteria and cyanobacteria. The protesta gave rise to Eukaryotes that evolved in to protozoa,metazoa and metaphyta. then came up the saprophytes, chemosynthesizers and finally the photosynthesizers. This provides plenty of free oxygen to the primitive atmosphere leading to the evolution of aerobic mode of respiration.
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