Which compound is NOT a component of a DNA nucleotide?

• A. Adenine
• B. Uracil
• C. Deoxyribose
• D. Phosphate group

Answer: (B)

Verified step by step guidance

1. Recall the basic structure of a DNA nucleotide, which consists of three components: a nitrogenous base, a five-carbon sugar, and a phosphate group.
2. Identify the nitrogenous bases found in DNA nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G).
3. Recognize that the sugar in DNA nucleotides is deoxyribose, a five-carbon sugar lacking one oxygen atom compared to ribose.
4. Understand that the phosphate group links nucleotides together to form the DNA backbone.
5. Note that uracil is a nitrogenous base found in RNA nucleotides, replacing thymine, and therefore is NOT a component of DNA nucleotides.