MCQ
What replaces thymine in RNA:
- AGuanine
- BAdenine
- CUracil
- DWater
✓
Answer
- Uracil
Explanation:
In RNA, uracil binds to adenine via two hydrogen bonds.
In DNA, the uracil nucleobase is replaced by thymine.
Uracil could be considered a demethylated form of thymine.
Each nucleotide in RNA contains a ribose sugar, with carbons numbered 1' through 5'. A base is attached to the 1' position, in general, adenine (A), cytosine (C), guanine (G), or uracil (U).
Adenine and guanine are purines, cytosine and uracil are pyrimidines.
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