Which nitrogenous base is found in ribonucleic acid (RNA) but normally not in deoxyribonucleic acid (DNA)?

### Why this is right RNA uses uracil in place of thymine. Adenine and guanine occur in both RNA and DNA. ### The other options - **Thymine**: normally occurs in DNA, where it pairs with adenine. - **Adenine**: occurs in both nucleic acids. - **Guanine**: occurs in both nucleic acids. ### Terms - **Ribonucleic acid (RNA)**: a nucleic acid whose sugar is ribose. - **Deoxyribonucleic acid (DNA)**: a nucleic acid whose sugar is deoxyribose. ### Remember RNA has uracil; DNA has thymine.