alleryIn RNA, which nitrogen base takes the place of the thymine that is found in DNA?
AAdenine
BGuanine
CCytosine
DUracil
Answer & Solution
Correct answer: D. Uracil
1. During transcription the mRNA sequence is complementary to the DNA template.
2. However, RNA does not contain thymine.
3. In place of thymine, RNA carries uracil.
4. Therefore the answer is uracil.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.10_
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