Protein is composed of 210 amino acids. Establish how many times the molecular weight of the region of the gene encoding a given protein exceeds the molecular weight of the protein if the average molecular weight of an amino acid is 110 and a nucleotide is 300. Explain the answer.
1) the genetic code is triplet, therefore, the protein, which consists of 210 amino acids, is encoded by 210×3 = 630 nucleotides;
2) the molecular weight of the protein: 210 x 110 = 23 100; molecular weight of the gene: 630 x 300 = 189,000;
3) a section of the DNA molecule is 189000 heavier than the protein encoded by it: 23100 = 8 times.
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