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DNA/Codon probability question

  1. Aug 30, 2007 #1
    1. The problem statement, all variables and given/known data

    A library of randomly synthesized duplex DNA strands (length = 6 bp) is generated.
    What percentage of these sequences would you expect that the restriction enzyme BamH1 (restriction site = GGATCC) would recognize?
    a. 0%
    b. 0.02%
    c. 0.48%
    d. 0.07%

    2. Relevant equations

    3. The attempt at a solution
    I think that the answer is b, but I'm just looking for confirmation. My reasoning is that there are 4 possible codons, A,T,C,G and so the chance that a randomly synthesized DNA strand of exactly GGATCC would simply be (1/4)^6 or 0.02%
  2. jcsd
  3. Aug 30, 2007 #2


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    Seems fine to me.
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