Question

Which is true according to Chargaff's rule?

• A. C + G = A + T
• B. A + G = T + C
• C. G = T
• D. A = C

Answer 1

Answer:

B. A + G = T + C

According to Chargaff’s rule in all cellular DNA, regardless of the species, number of adenosine residues is equal to the number of thymidine residues which means that A = T A = T: The amount of adenine (A) in DNA always equals the amount of thymine (T). G = C: The amount of guanine (G) in DNA always equals the amount of cytosine (C). A+G = T+C: The total number of purines (A+G) always equals the total number of pyrimidines (T+C).