Which set correctly lists the four nitrogenous bases found in DNA?

• A. Thymine, uracil, cytosine, guanine
• B. Adenine, uracil, cytosine, guanine
• C. Adenine, thymine, cytosine, uracil
• D. Adenine, thymine, cytosine, guanine

Answer: (D)

Verified step by step guidance

1. Recall that DNA is composed of four nitrogenous bases which are divided into two categories: purines and pyrimidines.
2. Identify the purines in DNA: adenine (A) and guanine (G).
3. Identify the pyrimidines in DNA: cytosine (C) and thymine (T).
4. Note that uracil (U) is found in RNA, not DNA, so any option containing uracil is incorrect for DNA bases.
5. Therefore, the correct set of nitrogenous bases in DNA is adenine, thymine, cytosine, and guanine.