Q. Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
A) Adenine, Thymine - Purines
B) Thymine, Uracil - Pyrimidines
C) Uracil, Cytosine - Pyrimidines
D) Guanine, Adenine - Purines
Explanation
[Solution from source] Adenine is a purine but thymine is a pyrimidine, so grouping them together as purines is wrong. Adenine and guanine are purines, and cytosine, thymine and uracil are pyrimidines, so the other pairs are correct. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.