Biol 2153, sections 1-4, dr. foltz, principles of genetics, spring 2012, homework #8: what is the base sequence of the dna strand that would be complementary to the following single- stranded dna molecules, 5" agttacctgatcgta 3". 3" aagagttcttaaggt 5": two double-stranded 25 base-pair dna fragments are heated in solution. Gc, and fragment b has 40 percent gc. Fragment a, with higher %gc, has higher density and is more thermostable than fragment b: the percent cytosine in a double-stranded dna is 17. In double-stranded dna, if (c) = 17 percent, then (g) = 17 percent. This means that the dna has 34 percent g-c, and 66 percent a-t base pairs. One purified strand is analyzed and has an [a+t]/[g+c] ratio of 0. 66 and an [a+g]/[t+c] ratio of. Hint: because these ratios are calculated for single strands, there is no necessary requirement that.