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Which ratio is constant for DNA?(a) A + G / T + C(b) A + T / G + C(c) A + C / U + G(d) A + U / G + C |
Answer» Right choice is (a) A + G / T + C Explanation: The molar concentration of purine bases A and G is equal to the molar concentration of pyrimidine bases T and C because one of each type makes up a base pair. Because of base pairing rules, A = T and G = C. The specific A – T and G – C content varies from species to species. But in any one species the ratio is constant. |
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