Nitrogenous Base
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BIOLOGY
Molecular Biology
Nitrogenous Base
Tiny chemical tweaks in nitrogenous bases shape the stability and evolution of genetic codes
4 days ago
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How does the chemical difference between thymine and uracil influence their role in nucleic acids?
Thymine and uracil are identical and interchangeable in both DNA and RNA.
The presence of a methyl group in thymine makes DNA more stable, while uracil without it is used in RNA.
Uracil contains a methyl group that makes RNA more stable than DNA.
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BIOLOGY
Molecular Biology
Nitrogenous Base
Nitrogenous bases form the genetic code's fundamental units in DNA and RNA structures
1 Feb 2026
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What structural difference distinguishes thymine from uracil in nucleic acids?
Uracil has an extra amine group compared to thymine.
Thymine contains an additional phosphate group not found in uracil.
Thymine has a methyl group at the fifth carbon, which uracil lacks.
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