What was marshall nirenberg and heinrich matthaei's contribution to our current understanding of the genetic code?
discovery of codons
discovery and extraction of dna
© creation of a model of dna
creation of photo 51
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Hello!

The answer to your question is A.

Discovery of codons.

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his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.