In a sample of double-stranded DNA, 30% of the bases are adenine. What percentage are guanine?

Answer and explanation

Correct answer: A. %

  1. Step 1: A pairs with T, so T and A + T .
  2. Step 2: G + C , and G = C, so G .
Answer
%.
Why not the others: %: Adenine and guanine do not pair, so their percentages differ. %: The combined G + C percentage was given. %: The percentage of all non-adenine bases was given.

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