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

The correct answer would be discovery of codons.

Marshall Nirenberg and Heinrich Matthaei experimentally decoded the triplet codons with the help of synthetic homopolymer of nucleic acid.

They used synthetic RNA which is made up of uracil units only that is, polyuridycil acid (poly-U) and a cellular component which could translate protein.

The poly-U RNA results in the formation of polypeptide chain entirely consisted of phenylalanine. Thus, UUU codes for phenylalanine.

Similarly, other codons were also deciphered.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics