Final answer:
The correct option for recognizing the nitrogenous bases and respective nucleotides is C. Adenosine, Thymidine, Guanosine, Cytidine, Uridine, which include the purines adenine and guanine, and the pyrimidines cytosine, thymine, and uracil.
Step-by-step explanation:
When learning to recognize the nitrogenous bases and respective nucleotides, the correct option is C. Adenosine, Thymidine, Guanosine, Cytidine, Uridine. Nitrogenous bases are divided into two categories: purines, which include adenine (A) and guanine (G), and pyrimidines, which include cytosine (C), thymine (T), and uracil (U).
The purines have a double-ring structure, while the pyrimidines have a single-ring structure. In DNA, the bases are adenine, guanine, cytosine, and thymine. However, in RNA, thymine is replaced with uracil. Remembering 'cut pyramid' can help you recall that cytosine, uracil, and thymine are pyrimidines.