what does radioactive thymidine do in DNA replication
C. Radioactive thymine would pair with nonradioactive guanine. D. All 4 bases of the DNA would be radioactive. E. neither of the 2 daughter cells would be radioactive. Hint: The radioactive thymine is simply acting as a label, to allow the researcher to distinguish newly made DNA from the original DNA.o both daughter cells will receive a new chromosome in which 1 strand is non radioactive, and the other one (the new strand) is radioactive). If you measure the cell, both will be radioactive. Thymine pairs with adenine, so C is incorrect. Source(s): http://en.wikipedia.org/wiki/Thymine.