Chemistry · Biomolecules
How does the presence of thymine instead of uracil contribute to the structural and chemical stability of DNA?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Thymine directly increases the catalytic activity of DNA polymerase during transcription.
- 2The methyl group in thymine protects DNA by making it less susceptible to spontaneous deamination and enzymatic degradation.✓
- 3Thymine forms three hydrogen bonds with adenine, unlike uracil which forms two.
- 4Thymine causes controlled mutations during replication to aid evolutionary survival.
Correct answer
The methyl group in thymine protects DNA by making it less susceptible to spontaneous deamination and enzymatic degradation.
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