Question

which base is found in rna but not in dna?
uracil
guanine
cytosine
adenine

Explanation:

DNA contains the bases adenine (A), thymine (T), cytosine (C), and guanine (G). RNA contains adenine (A), uracil (U), cytosine (C), and guanine (G). Uracil replaces thymine in RNA.

Answer:

A. uracil