Answer:
The correct answer is D. Cytosine and guanine appear in equal proportions in DNA.
Explanation:
Chargaff's rules state the relationship that exists between the nucleotides that make up DNA:
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). In synthesis: the total number of purine bases is equal to the total number of pyrimidine bases:
A + G = C + T
