An experiment conducted to study protein synthesis,radioactive thymine, and radi

Question

An experiment conducted to study protein synthesis,radioactive thymine, and radioactive uracil were added to a cultreof human cells. A few hours later, the culture was analyzed andradioactive mRNA was found a) Explain how an mRNA molecule is produced b) Explain why the mRNA produced is radioactive part 2) In a different experiment, radioactive uracil wasadded to a culture of human cells undergoing DNA replication. Whatwill be the characteristic of the resulting DNA in terms ofradioactivity? Explain An experiment conducted to study protein synthesis,radioactive thymine, and radioactive uracil were added to a cultreof human cells. A few hours later, the culture was analyzed andradioactive mRNA was found a) Explain how an mRNA molecule is produced b) Explain why the mRNA produced is radioactive part 2) In a different experiment, radioactive uracil wasadded to a culture of human cells undergoing DNA replication. Whatwill be the characteristic of the resulting DNA in terms ofradioactivity? Explain

Explanation / Answer

Not sure how much detail you're looking for but here itgoes:
B) The radioactive uracil would be present in the mRNA sinceit replaces adenine in the mRNA sequence. Since the mRNA wouldcontain the uracil, it would be radioactive.
Part 2) The DNA would not be radioactive because uracil is not used atall during the replication of DNA. Uracil replaces adenine in thereplication of mRNA as mentioned above.
Hope that helps

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