Question

If a hybrid DNA molecule labelled with $N^{15}$ is allowed to replicate four times in culture medium having $N^{14}$, the percentage of hybrid DNA after third generation would be

• A. $50\%$
• B. $25\%$
• C. $12.5\%$
• D. $6.5\%$

Answer 1

Answer: (C)

Correct answer is (c) $12.5\%$