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  4. Which of the following ratios is generally constant for a given species?

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Q. Which of the following ratios is generally constant for a given species?

NTA AbhyasNTA Abhyas 2022

Solution:

According to Chargaff, purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine).
The base ratio of A+T/G+C is specific for species.