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Question

Why in double stranded DNA, number of purines equal the number of pyrimidines?

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Solution

According to Chargaff's rule, the number of purines and pyrimidines exist in ratio 1: 1. This is so because purines bond with pyrimidines to form nucleotides hence in a double-stranded DNA, the number of purines is equal to the number of pyrimidines.

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