Pick up the smaller nitrogenous base:
Correct answer: C. Cytosine
- A. Purines
- B. Adenine
- C. Cytosine
- D. Guanine
Explanation
The correct answer is Cytosine. Pyrimidines, such as cytosine, thymine, and uracil, have a single-ring structure, making them smaller nitrogenous bases compared to purines, which have a two-ring structure. Cytosine is a pyrimidine, hence smaller than purines like adenine and guanine. The other options, adenine and guanine, are purines and are therefore larger in size.
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