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Proposed Early - ProposedEarly"Cells 1. 2....

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Proposed Early "Cells"   1. coacervates - first cells had lipid-based membranes as proposed by Oparin.   2. microspheres - first cells had protein-based membranes as proposed by Sidney Fox.   Origin of the Cell's Genetic Machinery   * Short strands of RNA most likely served as the first genes capable of replicating  themselves. Certain proteins may have served as enzymes catalyzing the replication  process, and the relationship between nucleic acids and proteins began. DNA would  have formed much later to contain the genetic code, and to complete what we now think 
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