Choices:
<span>discovery of codons
discovery and extraction of DNA
creation of a model of DNA
creation of Photo 51
Marshall Nirenberg and Heinrich Matthaei's contribution to our current understanding of the genetic code is the DISCOVERY OF CODONS.</span>
Nucleic acid is the macromolecule that carries code for building our body.
He worked with pea plants
Answer: 6 feet
Explanation: It says it in the question
It is a component of ribosomes ( rRNA stands for <span>ribosomal ribonucleic acid )
Hope this helps. :)</span>
