Thymine is a pyrimydine derivative water in which the 5’ HC position have group but uracil have hydrogen at 5’ C position

1. OH
2. NH₂
3. CH₃
4. C₂H₃

Hello Student
Correct Answer is 3. CH₃
Uracil another pyrimidine derivative is replaced by thymine of DNA. It was discovered in 1900 isolated by hydrolysis of yeast nuclein. The difference between thymine and uracil is that thymine has a methyl froup CH₃instead of hydrogen at 5’ C position.