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  4. A DNA molecule of Escherichia coli is heavy (full labelled with N 15) and is allowed to duplicate in a medium containing N14. In first generation, the two daughter DNA molecules:-

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Q. A DNA molecule of Escherichia coli is heavy (full labelled with $N^{ 15})$ and is allowed to duplicate in a medium containing $N^{14}$. In first generation, the two daughter DNA molecules:-

Molecular Basis of Inheritance

Solution:

Correct answer is (a) have same density but do not resemble their parent DNA