Question

If E.coli containing $N^{15}-N^{15}$ DNA was allowed to grow for 80 minutes in medium containing $N^{14}$ then, what would be the percentage of light density and hybrid density DNA molecule ?

• A. 87.5% light density ; 12.5% hybrid density
• B. 75% light density ; 25% hybrid density
• C. 25% light density ; 75% hybrid density
• D. 12.5% light density ; 87.5% hybrid density

Answer 1

Answer: (A)

Correct answer is (a) 87.5% light density ; 12.5% hybrid density