2018 01 55 PM 50/100 4/11/2018 03:18 PM Periodic Table Calculator of 8 MHE/Freem

Question

2018 01 55 PM 50/100 4/11/2018 03:18 PM Periodic Table Calculator of 8 MHE/Freeman etics: A Conceptual Approach 6th Edilion s is required to synthesize the deoxyribonucleoside triphosphates used in DNA replication. A eneticist grows some E.coll in a medium containing nonradioactive phosphorous for many generations. sample of the bacteria is then tansferred to a medium that contains a radloactive isotope of phosphorus (P). Samples of the bacteria are removed immediately after the transfer and after one and two rounds of replication. Assume that newly synthesized DNA contains 32p and the original DNA contains nonradloactive phosphorous. What will be the distribution of radiloactivity in the DNA of the bacteria in each sample? Immediately after the transfer After one round of replication After two rounds of replication oth strands have No 32P incorporated 50% of the DNA molecules SP incorporated. into the DNA. have S2P in both 50% of the DNA molecules have 32P in one strand. One strand has up

Explanation / Answer

Immediately after the transfer:
No 32P incorporated into the DNA.

After one round of replication:
One strand has 32P incorporated.
50% of the DNA molecules have 32P in one strand

After two rounds of replication:
Both strands has 32P incorporated.
50% of the DNA molecules have 32P in both strands

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