Molecular Basis Of Inheritance Question 129
Chargaff’s rules of base pairing state that:
Options:
A) The ratio of purines to pyrimidines is roughly equal in all tested organisms.
B) The ratio of A to T is roughly equal in all tested organisms.
C) The ratio of A + T to G + C is roughly equal in all tested organisms.
D) Both [a] and [b]
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Answer:
Correct Answer: D
Solution:
[d] Chargaff found that the relative ratios of purine to pyrimidines were equal.
Adenine and guanine are purines and cytosine and thymine are pyrimidines; therefore, ratios of adenine and thymine should be equal.
Chargaff also found that there is no conserved ratio between specific pairs ( $ \text{e.g., } A+T \text{ and } G+C $ ).
BETA
