| December 8, 2015

Phosphorus is required to synthesize dNTPs used in DNA replication. Imagine

you grow E. coli in media containing non-radioactive phosphorus for many

generations, then switch the E. coli to media containing radioactive

phosphorous (32P). You then sample the E. coli after one round of replication

for radioactivity. Where will you find radioactive phosphorus in the DNA?

a. Both strands will contain 32P

b. One strand will contain 32P

c. Neither strand will contain 32P

d. Drats! I knew I should have done suggested problem 12.19!

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