<prompt> If the molar percentage of guanine in a human DNA is 30, what is the molar percentage of adenine in that molecule?10.20.30.40.  <response>: Guanine base pairs with cytosine which, on a molar basis, will also equal 30 of the DNA. If guanine and cytosine constitute a total of 60 of DNA, the remaining percentage 40 must be equally divided between the base pairs of adenine and thymine 20 20. 