Purines found both in DNA and RNA are:
- AAdenine and thymine
- BAdenine and guanine
- CGuanine and cytosine
- DCytosine and thymine
Solution & Step-by-step Explanation
Nitrogenous bases are of two types:
Purines: Adenine (A) and Guanine (G). These are common to both DNA and RNA.
Pyrimidines: Cytosine (both), Thymine (DNA only), Uracil (RNA only).
Purines: Adenine (A) and Guanine (G). These are common to both DNA and RNA.
Pyrimidines: Cytosine (both), Thymine (DNA only), Uracil (RNA only).