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Question : In one polyncleotide strandof a DNA moleculethe ratio of A+T//G+C is 0.3. What is the A+G//T+Cratio of the entire DNA molecule ?

Answer»

0.3
0.6
1.2
1

Solution :(d) : ACCORDING to Chargaff's RULES (1950), purine and pyrimidinebase pairs are present in equal amounts in a DNA molecule.
i. E., `[A+G]=[T+C]`
or ` ([A+G)]/([T+C)]=1.


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