Question

1. what nucleotide base in dna is replaced by uracil in rna?

cytosine
guanine
adenine
thymine

Explanation:

DNA has four nucleotide bases: adenine (A), thymine (T), cytosine (C), and guanine (G). RNA also has four bases, but thymine in DNA is replaced by uracil (U) in RNA.

Answer:

D. thymine