If you started with one double stranded dna template, how many pcr cycles would it take to produce 256 double stranded copies:

Let x be the number of prc cycles that is needed in order for the desired stranded copies to be achieved. The equation that allows us to determine the value of x is,

      D = 2(2)^(x - 1)

Substituting the known value,
    256 = (2)(2)^(x - 1)

The value of x from the equation is 8.

ANSWER: 8

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