General Science • BiologyEasy
Which nucleic acid base is found in RNA instead of thymine, which is present in DNA?
A. Uracil✓ Correct Answer
B. Cytosine
C. Adenine
D. Guanine
💡 Solution & Explanation
Uracil is a pyrimidine nitrogenous base found exclusively in ribonucleic acid molecules, where it replaces thymine and pairs with adenine via two hydrogen bonds. Deoxyribonucleic acid contains thymine instead of uracil to enhance structural stability against mutation.
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