Answer:
In DNA, the four nucleotide bases are adenine (A), thymine (T), cytosine (C), and guanine (G). These bases pair with each other in a specific way: A pairs with T, and C pairs with G. This means that if we know the percentage of one base, we can predict the percentage of its complementary base.
In your sample of yeast DNA, if 31.5% of the bases are A, then the percentage of T must be 100 - 31.5 = 68.5%. This is because the sum of the percentage of A and the percentage of T must be 100%.
Therefore, the percentage of thymine (T) in the sample of yeast DNA is 68.5%.
Step-by-step explanation: