Protein consists of 120 amino acids. Establish the number of nucleotides of DNA and m-RNA regions encoding these amino

Protein consists of 120 amino acids. Establish the number of nucleotides of DNA and m-RNA regions encoding these amino acids and the total number of t-RNA molecules that are required to deliver these amino acids to the synthesis site.

1) one amino acid is encoded by three nucleotides, since the genetic code is triplet, therefore, the number of nucleotides per m-RNA: 120×3 = 360;
2) the number of nucleotides in a section of one DNA strand corresponds to the number of nucleotides per i-RNA – 360 nucleotides;
3) t-RNA transports one amino acid to the site of protein synthesis, therefore, the number of t-RNA is 120.

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