Question

Nucleic acids exhibit specific nitrogenous base pairing within their structures. All of the following base pairings are found in deoxyribonucleic acid EXCEPT: a. cytosine and guanine b. adenine and uracil c. adenine and thymine d. neither A nor B are found

Answer 1

The answer would be “B.” The four nitrogenous bases include adenine, guanine, thymine, and cytosine (A,G,T,C). In RNA, THYMINE is replaced by uracil. I hope this helps your learning!