Q. Which one of the following pairs of nitrogenous bases on nucleic acids, is wrongly matched with the category mentioned against it?
A) Thymine, uracil – Pyrimidines
B) Uracil, cytosine – Pyrimidines
C) Guanine, adenine – Purines
D) Adenine, thymine – Purines
Explanation
The nitrogenous bases are of two types, $i.e$., purine and pyrimidine. Purines are heterocyclic and two ring compounds, $e.g$., adenine, guanine. Pyrimidines are single ring compounds, $e.g$., thymine, cytosine, uracil.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.