A protein consists of 100 amino acids, determine how many times the molecular weight of the gene region encoding this protein exceeds the molecular weight of the protein if the average molecular weight of an amino acid is 100, and a nucleotide is 345 amu. Explain the answer.
1. The genetic code is triplet, therefore, a protein consisting of 100 amino acids encodes 300 nucleotides.
2. The molecular weight of the protein is 100 x 100 = 10000; molecular weight of the gene 300 x 345 = 103500
3. A piece of DNA is 10 times heavier than the protein it encodes (103500: 10000) = 10.35
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