If radioactive thymine is added to a cell culture growth medium, which cellular molecules will be radioactively labeled? a. proteins
b. rna
c. dna
d. both rna and dna

The correct answer is C. DNA

Explanation:

In cells, thymine can be found in the DNA or Deoxyribonucleic Acid because this is thymine is a nucleobase, which is an essential substance for DNA's structure. Moreover, thymine differs from other nucleobases such as guanine or adenine because other nucleobases can also be found in RNA or Ribonucleic acid but thymine is exclusive of DNA. In this context, the molecules that will be radioactively labeled in this case is DNA (Option C).

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