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Milestones in DNA history

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The first organism ever to be cloned from adult cells was :

  Northern Leopard frogs

  A cow

  Dolly, the sheep


  Half-n-half Clue


The scientist who created the first recombinant DNA molecules :

  Ian Wilmut

  Paul Berg

  Howard Temin

  James Shapiero

  Half-n-half Clue


The scientist(s) who developed a technique to sequence DNA and later won a Nobel prize for their achievement in 1980 is(are) :

  Walter Gilbert and Frederick Sanger

  Clara Bloomfield

  Arnold Levine and Gerald Edelman

  Harold Varmus and Rodney Porter

  Half-n-half Clue


The scientist who first showed that genetic material is a heat stable chemical is :

  Erwin Chargaff

  Friedrich Miescher

  Oswald Avery

  Franklin Griffith

  Half-n-half Clue


Robert Holley, Har Gobind Khorana, and Marshall Nirenberg shared the Nobel prize for medicine in 1968 for their contribution to DNA reasearch, which was :

  the discovery of the presence of DNA which could not be expressed.

  the discovery of the lac(tose) operon.

  the elucidation of protein synthesis.

  the discovery of the structure of DNA.

  Half-n-half Clue


Proof of the model of DNA replication suggested by Watson and Crick came from the experiments of :

  Sidney Brenner and Francis Crick

  Stanley Cohen and Herbert Boyer

  George Beadle and Edward Tatum

  M. S. Meselson and F. W. Stahl

  Half-n-half Clue


The scientist who identified the transforming agent in Griffith's famous experiment (1928) as DNA was :

  Oswald Avery

  Friedrich Miescher

  Erwin Chargaff

  Peter Mitchell

  Half-n-half Clue

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