Starfish DNA Base Composition

Question:

If starfish DNA is found to have 19% thymine, what percentage of adenine would the starfish DNA have?

Answer:

In DNA, adenine pairs with thymine, hence the percentage of adenine would be equal to that of thymine. Thus, if the starfish DNA has 19% thymine, it would also have 19% adenine.

Explanation:

In DNA, the base pairing rules state that adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). This means that the percentage of adenine would be equal to the percentage of thymine. Hence in the Starfish DNA, if the percentage of thymine is 19%, the percentage of adenine would also be 19%.

By following the base pairing rules, we can determine that the percentage of adenine in the starfish DNA is indeed 19%. This shows the complementary nature of DNA strands and how each base pairs specifically with another base.