Question

what was marshall nirenberg and heinrich matthaeis contribution to our current understanding of the genetic code?
o discovery of codons
o discovery and extraction of dna
o creation of a model of dna
o creation of photo 51

Explanation:

Marshall Nirenberg and Heinrich Matthaei are known for deciphering the genetic code. They discovered codons, which are sequences of three - nucleotide bases in DNA or RNA that correspond to specific amino acids during protein synthesis.

Answer:

discovery of codons