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If you grow bacteria in heavy nitrogen a...

If you grow bacteria in heavy nitrogen and then switched them to light nitrogen, how many generations after switching would have some light `//` light DNA ?

A

First generation

B

Second generation

C

Only the third generation

D

Never, because replication is semiconservative

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The correct Answer is:
B
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GRB PUBLICATION-THE GENETIC MATERIAL-DNA REPLICATION
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  2. Escherichia coli fully labelled with .^(15)N is allowed to grow in .^(...

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  3. If you grow bacteria in heavy nitrogen and then switched them to light...

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