Question

which nitrogen base is not found in dna? adenine guanine cytosine uracil

Explanation:

DNA (Deoxyribonucleic Acid) contains four nitrogen - bases: Adenine (A), Guanine (G), Cytosine (C), and Thymine (T). RNA (Ribonucleic Acid) contains Adenine (A), Guanine (G), Cytosine (C), and Uracil (U). So, Uracil is not found in DNA.

Answer:

Uracil