Final answer:
In a DNA molecule of 50 base pairs with 15 cytosine bases (C), there will also be 15 guanine (G), 10 adenine (A), and 10 thymine (T) bases due to Chargaff's rules of complementary base pairing.
Step-by-step explanation:
The subject of this question pertains to the structure of DNA and base pairing, specifically how cytosine and thymine are related in the context of a DNA molecule. According to Chargaff's rules, in a double-stranded DNA molecule, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of guanine (G) is equal to the amount of cytosine (C).
Therefore, if a DNA molecule of 50 base pairs contains 15 cytosine bases (C), it must also contain 15 guanine bases (G) to maintain the base pairing rule. Since there are 50 base pairs in total and we already have 15 C and 15 G bases accounted for (30 bases total), the remaining 20 bases must be divided equally between adenine and thymine due to their complementary base pairing. This means there would be 10 adenine bases and 10 thymine bases in the DNA molecule.