Unformatted text preview: consequence of RNA activity. Then DNA activity could have led to protein synthesis. For a cell to come into being, some sort of enclosing membrane is required to hold together the organic materials of the cytoplasm. A generation ago, scientists believed that membranous droplets formed spontaneously. These membranous droplets called protocells were presumed to be the first cell. Modem scientists believe, however, that protocells do not carry any genetic information and lack the internal organization of cells. Thus the protocell theory is not widely accepted. Several groups of scientists are currently investigating the synthesis of polypeptides and short nucleic acids on the surface of clay. The first cells remain a mystery....
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- Fall '07
- Proteins, RNA molecules, primitive earth