Target Exam

CUET

Subject

Biology

Chapter

Molecular Basis of Inheritance

Question:

What is another chemical name for thymine ?

Options:

3-bromouracil .

5-methyl uracil .

2-methyle uracil .

4 -methyl uracil .

Correct Answer:

5-methyl uracil .

Explanation:

The correct answer is Option (2) -5-methyl uracil.

Thymine is a pyrimidine base found in DNA, and its chemical structure is similar to that of uracil (which is found in RNA) except that thymine has a methyl group (-CH₃) attached at the 5th carbon position. Hence, it is also called 5-methyl uracil.