Question

why can uracil be used as a \clue\ to identify rna in a strand? because uracil is found in both dna and rna. because uracil indicates a damaged dna strand. because uracil is always paired with thymine. because uracil is unique to rna.

Explanation:

Uracil is one of the four nitrogen - containing bases in RNA. DNA contains thymine instead of uracil. So the presence of uracil can indicate RNA as it is unique to RNA.

Answer:

Because uracil is unique to RNA.