document.write( "Question 492026: A DNA molecule is shown on the following picture. A nucleotide is represented by one of the letters {a, t, c, g}. A codon is defined to be a triplet of nucleotides. The order of the nucleotides in a codon is significant, and the nucleotides can be repeated. These codons are important in determining how DNA is transformed into protein. How many different codons are possible?
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Algebra.Com's Answer #334907 by chessace(471)\"\" \"About 
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4 independent choices, 3 rounds, --> 4^3 = 64.
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