17. If a strand of DNA has \( 20 \% \) thymine, what percent of guanine will it contain?
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Did you know that DNA is composed of four nucleotide bases: adenine (A), thymine (T), cytosine (C), and guanine (G)? They pair up specifically: A with T and C with G. So, if you have \( 20\% \) thymine (T), then you must also have \( 20\% \) adenine (A) since they pair together. This leaves \( 60\% \) for cytosine (C) and guanine (G). Since C and G pair with each other, they must be equal! So the remaining \( 60\% \) is split evenly, leading to \( 30\% \) guanine (G). If you're a fan of puzzles, think about how this base pairing relates to genetic diversity in organisms! A simple change in the percentage of one base can lead to such a vast difference in traits. Understanding this can help in fields like genetics and biotechnology, where manipulating DNA sequences leads to exciting advancements, from gene therapy to creating genetically modified organisms.