TLS Online TPP Program

#Question id: 5010


Which of the following steps has not yet been accomplished by scientists studying the origin of life? 

#Unit 9. Evolution & Diversity of Life Forms
  1. synthesis of small RNA polymers by ribozymes

  2. abiotic synthesis of polypeptides

  3. formation of molecular aggregates with selectively permeable membranes

  4. formation of protobionts that use DNA to direct the polymerization of amino acids