If ¹⁴C-labeled uracil is added to the growth medium of cells, what macromolecules will be labeled?
A) DNA
B) RNA
C) both DNA and RNA
D) polypeptides

Question

Quizplus · Accepted Answer

¹⁴C-labeled uracil is specifically incorporated into RNA during transcription, making RNA the only labeled macromolecule. DNA is not directly involved in the incorporation of uracil and polypeptides are not macromolecules that incorporate nucleotides.

If ¹⁴C-Labeled Uracil Is Added to the Growth Medium of Cells