Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet" ?

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet" ?
  1. Beadle and Tatum
  2. Nirenberg and Mathaei
  3. Hershey and Chase
  4. Morgan and Sturtevant

Solution

Marshall Nirenberg and J. Heinrich Matthaei were the scientists who, in 1961, cracked the genetic code and demonstrated that it is a "triplet." They conducted experiments using synthetic RNA sequences and demonstrated that groups of three nucleotides (codons) in RNA specify particular amino acids. This discovery was pivotal in understanding how genetic information is translated into proteins.

Asked in: NEET 2009 (Mains)

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