Which of the following is a nitrogenous base found in DNA?

• A. Adenine
• B. Uracil
• C. Thymine
• D. Cytosine

Answer: (A)

Verified step by step guidance

1. Understand that DNA is composed of four nitrogenous bases: Adenine, Thymine, Cytosine, and Guanine.
2. Recall that Uracil is a nitrogenous base found in RNA, not DNA.
3. Identify that Adenine pairs with Thymine in DNA through hydrogen bonds.
4. Recognize that Thymine and Cytosine are also nitrogenous bases found in DNA.
5. Conclude that among the options given, Adenine is indeed a nitrogenous base found in DNA.