If 30% of the nucleotides in a genome are A (adenine),what would be the percentage of nucleotides that are G (guanine)?

Question

Quizplus · Accepted Answer

In a DNA molecule, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). Therefore, if 30% of the nucleotides are adenine, 30% must also be thymine, leaving 40% for guanine and cytosine combined. Since guanine and cytosine are present in equal amounts, guanine would also make up 20% of the nucleotides, not an option listed. However, the question seems to be based on the assumption of Chargaff's rule, which implies equal amounts of A and T, and G and C, but the calculation provided in the options seems incorrect based on the standard understanding of DNA base pairing. Given the options, none directly correspond to the correct calculation based on the provided information and standard base pairing rules. The correct interpretation of the question's intent might be flawed, as it seems to expect an answer based on incorrect premises. The correct answer should be 20%, but since it's not an option and assuming a mistake in the premise, there seems to be a misunderstanding in the question setup.

If 30% of the Nucleotides in a Genome Are a (Adenine),what