The number of purines in a segment of DNA molecule is 68. What will be the number of pyrimidines in this segment?
(a) 34
(b) 43
(c) 68
(d) 86
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Solution
(c) 68
According to Chargaff’s rule, the number of purines is always equal to the number of pyrimidines, i.e. A + G = T + C.
Concept: Structure of DNA and RNA
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