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22 December, 20:47

The mitochondrial DNA helicase has 612 amino acids. What is the length of the mRNA from this protein is translated? Show your work and explain.

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  1. 22 December, 21:14
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    The answer is 1836 nucleotide bases.

    It is known that three nucleotide bases in mRNA are called codon and that each codon codes for the specific amino acid. For 3 nucleotide bases in mRNA, there is 1 amino acid in a protein. So, there are 3 times more nucleotide bases in mRNA than amino acids in the protein. This can be represented mathematically:

    3 nucleotide bases : 1 amino acid = x nucleotide bases : 612 amino acids

    3 nucleotide bases x 612 amino acids : 1 amino acids = x nucleotide bases

    x nucleotide bases = 612 x 3 nucleotide bases

    x nucleotide bases = 1836 nucleotide bases.

    So, mRNA long 1836 nucleotide bases will give a protein with 612 amino acids.
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